How can you detect the version of a browser

Question

I ve been searching around for code that would let me detect if the user visiting the website has Firefox 3 or 4  All I have found is code to detect the type of browser but not the version   How can I detect the version of a browser like this

User · Answer

This page seems to have a pretty nice snippet which only uses the appString and appVersion property as a last resort as it claims them to be unreliable with certain browsers  The code on the page is as follows   var nVer   navigator appVersion  var nAgt   navigator userAgent  var browserName    navigator appName  var fullVersion       parseFloat navigator appVersion    var majorVersion   parseInt navigator appVersion 10   var nameOffset verOffset ix      In Opera 15   the true version is after  OPR    if   verOffset nAgt indexOf  OPR      -1     browserName    Opera    fullVersion   nAgt substring verOffset 4        In older Opera  the true version is after  Opera  or after  Version  else if   verOffset nAgt indexOf  Opera     -1     browserName    Opera    fullVersion   nAgt substring verOffset 6    if   verOffset nAgt indexOf  Version     -1      fullVersion   nAgt substring verOffset 8        In MSIE  the true version is after  MSIE  in userAgent else if   verOffset nAgt indexOf  MSIE     -1     browserName    Microsoft Internet Explorer    fullVersion   nAgt substring verOffset 5        In Chrome  the true version is after  Chrome   else if   verOffset nAgt indexOf  Chrome     -1     browserName    Chrome    fullVersion   nAgt substring verOffset 7        In Safari  the true version is after  Safari  or after  Version   else if   verOffset nAgt indexOf  Safari     -1     browserName    Safari    fullVersion   nAgt substring verOffset 7    if   verOffset nAgt indexOf  Version     -1      fullVersion   nAgt substring verOffset 8        In Firefox  the true version is after  Firefox   else if   verOffset nAgt indexOf  Firefox     -1     browserName    Firefox    fullVersion   nAgt substring verOffset 8        In most other browsers   name version  is at the end of userAgent  else if    nameOffset nAgt lastIndexOf      1   lt              verOffset nAgt lastIndexOf             browserName   nAgt substring nameOffset verOffset    fullVersion   nAgt substring verOffset 1    if  browserName toLowerCase    browserName toUpperCase        browserName   navigator appName          trim the fullVersion string at semicolon space if present if   ix fullVersion indexOf        -1     fullVersion fullVersion substring 0 ix   if   ix fullVersion indexOf        -1     fullVersion fullVersion substring 0 ix    majorVersion   parseInt    fullVersion 10   if  isNaN majorVersion      fullVersion       parseFloat navigator appVersion     majorVersion   parseInt navigator appVersion 10      document write       Browser name      browserName   lt br gt      Full version      fullVersion   lt br gt      Major version     majorVersion   lt br gt      navigator appName     navigator appName   lt br gt      navigator userAgent     navigator userAgent   lt br gt

User · Answer

lt script type  text javascript  gt  var version   navigator appVersion  alert version    lt  script gt

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var ua   navigator userAgent   if   Firefox    test ua      var Firefox    Firefox    0-9  A-z     exec ua  1

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I have made a script in ASP code to detect browser  browser version  OS and OS version  The reason for me to do this in ASP was because i want to store the data in a log-database  So I had to detect the browser serverside   Here is the code   on error resume next ua   lcase Request ServerVariables  HTTP USER AGENT    moz   instr ua  mozilla     ffx   instr ua  firefox     saf   instr ua  safari   crm   instr ua  chrome    max   instr ua  maxthon    opr   instr ua  opera   ie4   instr ua  msie 4    ie5   instr ua  msie 5    ie6   instr ua  msie 6    ie7   instr ua  msie 7    ie8   instr ua  trident 4 0   ie9   instr ua  trident 5 0    if moz gt 0 then      BrowserType    Mozilla      BrVer   mid ua moz 8  instr moz ua     - moz 8    end if if ffx gt 0 then      BrowserType    FireFox      BrVer   mid ua ffx 8  end if if saf gt 0 then      BrowserType    Safari      BrVerPlass   instr ua  version       BrVer   mid ua BrVerPlass 8  instr BrVerPlass ua     - BrVerPlass 8    end if if crm gt 0 then      BrowserType    Chrome      BrVer   mid ua crm 7  instr crm ua     - crm 7    end if if max gt 0 then      BrowserType    Maxthon      BrVer   mid ua max 8  instr max ua     - max 8    end if if opr gt 0 then      BrowserType    Opera      BrVerPlass   instr ua  presto       BrVer   mid ua BrVerPlass 7  instr BrVerPlass ua     - BrVerPlass 7    end if if ie4 gt 0 then      BrowserType    Internet Explorer      BrVer    4  end if if ie5 gt 0 then      BrowserType    Internet Explorer      BrVer    5  end if if ie6 gt 0 then      BrowserType    Internet Explorer      BrVer    6  end if if ie7 gt 0 then      BrowserType    Internet Explorer      BrVer    7  end if if ie8 gt 0 then      BrowserType    Internet Explorer      BrVer    8      if ie7 gt 0 then BrVer   BrVer  amp     in IE7 compability mode   end if if ie9 gt 0 then      BrowserType    Internet Explorer      BrVer    9      if ie7 gt 0 then BrVer   BrVer  amp     in IE7 compability mode       if ie8 gt 0 then BrVer   BrVer  amp     in IE8 compability mode   end if  OSSel   mid ua instr ua      1  instr ua     -instr ua      -1  OSver   mid ua instr ua      1  instr ua     -instr ua      -1   if BrowserType    Internet Explorer  then     OSStart   instr ua          OSStart   instr OSStart 1 ua                  OSStopp   instr OSStart 1 ua          OSsel   mid ua OSStart 2  OSStopp-OSStart -2  end if      Select case OSsel         case  windows nt 6 1              OS    Windows              OSver    7          case  windows nt 6 0              OS    Windows              OSver    Vista          case  windows nt 5 2              OS    Windows              OSver    Srv 2003   XP x64          case  windows nt 5 1              OS    Windows              OSver    XP          case else             OS   OSSel     End select  Response write   lt br gt    amp  ua  amp    lt br gt    amp  BrowserType  amp    lt br gt    amp  BrVer  amp    lt br gt    amp  OS  amp    lt br gt    amp  OSver  amp    lt br gt     Use the variables here for whatever you need

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This is a Update on Fzs2  amp  kennebec For New Edge Chromium  x000D   x000D  function get browser         var ua navigator userAgent tem M ua match   opera chrome safari firefox msie trident           s   d   i              if  trident i test M 1             tem   brv       d   g exec ua                  return  name  IE  version  tem 1                          if M 1     Chrome            tem ua match   bEdg    d             if tem  null     return  name  Edge Chromium    version tem 1             tem ua match   bOPR    d             if tem  null     return  name  Opera   version tem 1                      M M 2    M 1   M 2     navigator appName  navigator appVersion   -         if  tem ua match  version    d   i    null   M splice 1 1 tem 1         return         name  M 0         version  M 1             var browser get browser       browser name    Edge Chromium                                 browser version    86   console log browser   x000D   x000D   x000D

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You can see what the browser says  and use that information for logging or testing multiple browsers    x000D   x000D  navigator sayswho   function    x000D      var ua  navigator userAgent  tem   x000D      M  ua match   opera chrome safari firefox msie trident           s   d   i         x000D      if  trident i test M 1     x000D          tem     brv       d   g exec ua         x000D          return  IE    tem 1          x000D        x000D      if M 1      Chrome    x000D          tem  ua match   b OPR Edge     d      x000D          if tem   null  return tem slice 1  join      replace  OPR    Opera    x000D        x000D      M  M 2    M 1   M 2     navigator appName  navigator appVersion   -     x000D      if  tem  ua match  version    d   i     null  M splice 1  1  tem 1    x000D      return M join       x000D        x000D   x000D  console log navigator sayswho      outputs   Chrome 62  x000D   x000D   x000D

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I use this piece of javascript code based on what I could find in another posts   x000D   x000D  var browserHelper   function          var self                IE 6      self isIEBrowser   function              return    cc on    false      document documentMode                  Opera 8 0      self isOperaBrowser   function              return    window opr  amp  amp    opr addons                   window opera                navigator userAgent indexOf   OPR     gt   0                  Firefox 1 0      self isFirefoxBrowser   function              return typeof InstallTrigger      undefined                   Safari 3 0      self isSafariBrowser   function              return  constructor i test window HTMLElement                  function  p    return p toString         object SafariRemoteNotification        window  safari       typeof safari      undefined   amp  amp  window  safari   pushNotification                    Edge 20      self isEdgeBrowser   function              return  self isIEBrowser    amp  amp    window StyleMedia                  Chrome 1 - 87     self isChromeBrowser   function              return    window chrome  amp  amp     window chrome webstore      window chrome runtime                   navigator userAgent indexOf  Chrome    gt  -1   amp  amp   self isOperaBrowser                    Edge  based on chromium      self isEdgeChromiumBrowser   function              return self isChromeBrowser    amp  amp   navigator userAgent indexOf  Edg      -1                   Blink     self isBlinkBasedOnBrowser   function              return  self isChromeBrowser      self isOperaBrowser     amp  amp    window CSS                  Returns the name of the navigator     self browserName   function               if  self isOperaBrowser    return  Opera            if  self isEdgeBrowser    return  Edge            if  self isEdgeChromiumBrowser    return  Edge  based on chromium             if  self isFirefoxBrowser    return  Firefox            if  self isIEBrowser    return  Internet Explorer            if  self isSafariBrowser    return  Safari            if  self isChromeBrowser    return  Chrome            return  Unknown                   return self      var bName   document getElementById  browserName    bName innerText   browserHelper   browserName    x000D   browserName     font-family  Arial  Verdana    font-size  1 2rem    color   ff8000    text-align  center    border  2px solid  ff8000    border-radius   5rem    padding   5rem    max-width  25     margin  auto    x000D   lt div id  browserName  gt  lt  div gt  x000D   x000D   x000D

User · Answer

For this you need to check the value of navigator appVersion or navigator userAgent Try using  console log navigator appVersion

User · Answer

Here are several prominent libraries that handle browser detection as of May 2019   Bowser by lancedikson - 3 761 s - Last updated May 26  2019 - 4 8KB   x000D   x000D  var result   bowser getParser window navigator userAgent   x000D  console log result   x000D  document write  You are using     result parsedResult browser name   x000D                   v    result parsedResult browser version    x000D                   on     result parsedResult os name   x000D   lt script src  https   unpkg com bowser 2 4 0 es5 js  gt  lt  script gt  x000D   x000D   x000D     supports Edge based on Chromium    Platform js by bestiejs - 2 250 s - Last updated Oct 30  2018 - 5 9KB   x000D   x000D  console log platform   x000D  document write  You are using     platform name   x000D                   v    platform version    x000D                   on     platform os   x000D   lt script src  https   cdnjs cloudflare com ajax libs platform 1 3 5 platform min js  gt  lt  script gt  x000D   x000D   x000D    jQuery Browser by gabceb - 504 s - Last updated Nov 23  2015 - 1 3KB   x000D   x000D  console log   browser  x000D  document write  You are using       browser name   x000D                   v      browser versionNumber    x000D                   on       browser platform   x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery-browser 0 1 0 jquery browser min js  gt  lt  script gt  x000D   x000D   x000D    Detect js  Archived  by darcyclarke - 522 s - Last updated Oct 26  2015 - 2 9KB   x000D   x000D  var result   detect parse navigator userAgent   x000D  console log result   x000D  document write  You are using     result browser family   x000D                   v    result browser version    x000D                   on     result os family   x000D   lt script src  https   cdnjs cloudflare com ajax libs Detect js 2 2 2 detect min js  gt  lt  script gt  x000D   x000D   x000D    Browser Detect  Archived  by QuirksMode - Last updated Nov 14  2013 - 884B   x000D   x000D  console log BrowserDetect  x000D  document write  You are using     BrowserDetect browser   x000D                   v    BrowserDetect version    x000D                   on     BrowserDetect OS   x000D   lt script src  https   kylemit github io libraries libraries BrowserDetect js  gt  lt  script gt  x000D   x000D   x000D      Notable Mentions    WhichBrowser - 1 355 s - Last updated Oct 2  2018 Modernizr - 23 397 s - Last updated Jan 12  2019 - To feed a fed horse  feature detection should drive any canIuse style questions   Browser detection is really just for providing customized images  download files  or instructions for individual browsers    Further Reading   Stack Overflow - Browser detection in JavaScript  Stack Overflow - How to detect Safari  Chrome  IE  Firefox and Opera browser

User · Answer

I wrote this for my needs   It get info like if is a mobile device or if has a retina display  try it  var nav             isMobile function                return  navigator userAgent match  iPhone iPad iPod Android BlackBerry Opera Mini IEMobile i     null                      isDesktop function                return  navigator userAgent match  iPhone iPad iPod Android BlackBerry Opera Mini IEMobile i     null                      isAndroid  function                 return navigator userAgent match  Android i                      isBlackBerry  function                 return navigator userAgent match  BlackBerry i                      isIOS  function                 return navigator userAgent match  iPhone iPad iPod i                      isOpera  function                 return navigator userAgent match  Opera Mini i                      isWindows  function                 return navigator userAgent match  IEMobile i                      isRetina function                return window devicePixelRatio  amp  amp  window devicePixelRatio  gt  1                     isIPad function                isIPad     ipad gi  test navigator platform               return isIPad                     isLandscape function                if window innerHeight  lt  window innerWidth                   return true                            return false                     getIOSVersion function                if this isIOS                     var OSVersion   navigator appVersion match  OS   d   d   i                   OSVersion   OSVersion 1     OSVersion 1  replace             0                  return OSVersion                            else                 return false                     isStandAlone function                if   is navigator standalone                   return navigator standalone              return false                     isChrome function                var isChrome     Chrome gi  test navigator appVersion               var isSafari     Safari gi  test navigator appVersion              return isChrome  amp  amp  isSafari                     isSafari function                var isSafari     Safari gi  test navigator appVersion              var isChrome     Chrome gi  test navigator appVersion              return  isChrome  amp  amp  isSafari

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This combines kennebec s  K  answer with Hermann Ingjaldsson s  H  answer    Maintains original answer s minimal code   K  Works with Microsoft Edge  K  Extends the navigator object instead of creating a new variable object   K  Separates browser version and name into independent child objects   H     nbsp   navigator browserSpecs    function        var ua   navigator userAgent  tem           M   ua match   opera chrome safari firefox msie trident           s   d   i             if  trident i test M 1             tem     brv       d   g exec ua                 return  name  IE  version  tem 1                     if M 1      Chrome            tem   ua match   b OPR Edge     d              if tem    null  return  name tem 1  replace  OPR    Opera   version tem 2              M   M 2    M 1   M 2     navigator appName  navigator appVersion   -         if  tem   ua match  version    d   i     null          M splice 1  1  tem 1        return  name M 0   version M 1           console log navigator browserSpecs     Object   name   Firefox   version   42     if  navigator browserSpecs name     Firefox            Do something for Firefox      if  navigator browserSpecs version  gt  42               Do something for Firefox versions greater than 42          else          Do something for all other browsers

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var nVer   navigator appVersion  var nAgt   navigator userAgent  var browserName    navigator appName  var fullVersion       parseFloat navigator appVersion   var majorVersion   parseInt navigator appVersion 10   var nameOffset verOffset ix      In Opera  the true version is after  Opera  or after  Version   if   verOffset nAgt indexOf  Opera     -1     browserName    Opera    fullVersion   nAgt substring verOffset 6    if   verOffset nAgt indexOf  Version     -1     fullVersion   nAgt substring verOffset 8        In MSIE  the true version is after  MSIE  in userAgent  else if   verOffset nAgt indexOf  MSIE     -1     browserName    Microsoft Internet Explorer    fullVersion   nAgt substring verOffset 5        In Chrome  the true version is after  Chrome   else if   verOffset nAgt indexOf  Chrome     -1     browserName    Chrome    fullVersion   nAgt substring verOffset 7        In Safari  the true version is after  Safari  or after  Version   else if   verOffset nAgt indexOf  Safari     -1     browserName    Safari    fullVersion   nAgt substring verOffset 7    if   verOffset nAgt indexOf  Version     -1     fullVersion   nAgt substring verOffset 8        In Firefox  the true version is after  Firefox   else if   verOffset nAgt indexOf  Firefox     -1     browserName    Firefox    fullVersion   nAgt substring verOffset 8        In most other browsers   name version  is at the end of userAgent  else if    nameOffset nAgt lastIndexOf      1   lt             verOffset nAgt lastIndexOf            browserName   nAgt substring nameOffset verOffset    fullVersion   nAgt substring verOffset 1    if  browserName toLowerCase    browserName toUpperCase        browserName   navigator appName           trim the fullVersion string at semicolon space if present  if   ix fullVersion indexOf        -1     fullVersion fullVersion substring 0 ix   if   ix fullVersion indexOf        -1     fullVersion fullVersion substring 0 ix    majorVersion   parseInt    fullVersion 10   if  isNaN majorVersion      fullVersion       parseFloat navigator appVersion    majorVersion   parseInt navigator appVersion 10      document write       Browser name      browserName   lt br gt      Full version      fullVersion   lt br gt      Major version     majorVersion   lt br gt      navigator appName     navigator appName   lt br gt      navigator userAgent     navigator userAgent   lt br gt       See the demo here  http   jsfiddle net hw4jM 3

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I was looking for a solution for myself  since jQuery 1 9 1 and above have removed the   browser functionality  I came up with this little function that works for me  It does need a global variable  I ve called mine  browser  in order to check which browser it is  I ve written a jsfiddle to illustrate how it can be used  of course it can be expanded for other browsers by just adding a test for  browser foo  where foo is the name of the browser  I did just the popular ones   detectBrowser     browser        function detectBrowser       var uagent   navigator userAgent toLowerCase          match           browser chrome     webkit  test uagent    amp  amp   chrome  test uagent        amp  amp                         edge  test uagent       browser firefox    mozilla  test uagent   amp  amp   firefox  test uagent       browser msie       msie  test uagent         trident  test uagent                               edge  test uagent       browser safari     safari  test uagent    amp  amp   applewebkit  test uagent   amp  amp                         chrome  test uagent       browser opr        mozilla  test uagent   amp  amp   applewebkit  test uagent   amp  amp                        chrome  test uagent    amp  amp   safari  test uagent        amp  amp                        opr  test uagent       browser version          for  x in  browser        if   browser x            match   uagent match                  new RegExp        x      msie     msie edge    x              0-9                              if  match             browser version   match 3           else           match   uagent match new RegExp  rv   0-9                 browser version   match   match 1                      break               browser opera    browser opr    delete  browser opr      To check if the current browser is Opera you would do  if   browser opera       Opera specific code     Edit Fixed the formatting  fixed the detection for IE11 and Opera Chrome  changed to browserResult from result  Now the order of the  browser keys doesn t matter  Updated jsFiddle link   2015 08 11 Edit Added new testcase for Internet Explorer 12  EDGE   fixed a small regexp problem  Updated jsFiddle link

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x000D   x000D  navigator sayswho   function    x000D      var ua  navigator userAgent  tem   x000D      M  ua match   opera chrome safari firefox msie trident           s   d   i         x000D      if  trident i test M 1     x000D          tem     brv       d   g exec ua         x000D          return  IE    tem 1          x000D        x000D      if M 1      Chrome    x000D          tem  ua match   b OPR Edge     d      x000D          if tem   null  return tem slice 1  join      replace  OPR    Opera    x000D        x000D      M  M 2    M 1   M 2     navigator appName  navigator appVersion   -     x000D      if  tem  ua match  version    d   i     null  M splice 1  1  tem 1    x000D      return M join       x000D        x000D   x000D  console log navigator sayswho      outputs   Chrome 62  x000D   x000D   x000D

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Here this has better compatibility then  kennebec snippet  will return browser name and version  returns 72 instead of 72 0 3626 96    Tested on Safari  Chrome  Opera  Firefox  IE  Edge  UCBrowser  also on mobile   function browser         var userAgent   navigator userAgent          match   userAgent match   opera chrome crios safari ucbrowser firefox msie trident           s   d   i                 result               tem       if   trident i test match 1              tem     brv       d   g exec userAgent                 result name    Internet Explorer         else if  match 1       Chrome             tem   userAgent match   b OPR Edge     d               if  tem  amp  amp  tem 1                 result name   tem 0  indexOf  Edge       0    Edge     Opera                       if   result name            tem   userAgent match  version    d   i      iOS support         result name   match 0  replace                       if  result name indexOf  MSIE       0                result name    Internet Explorer                     if  userAgent match  CriOS                  result name    Chrome                        if  tem  amp  amp  tem length            match match length - 1    tem tem length - 1              result version   Number match match length - 1         return result

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I wrote a version detector based on Hermann Ingjaldsson s answer  but more robust and which returns an object with name version data in it   It covers the major browsers but I don t bother with the plethora of mobile ones and minor ones   function getBrowserData nav        var data            var ua   data uaString   nav userAgent      var browserMatch   ua match   opera chrome safari firefox msie trident           s    d      i             if  browserMatch 1     browserMatch 1    browserMatch 1  toLowerCase          var operaMatch   browserMatch 1       chrome       if  operaMatch    operaMatch   ua match   bOPR     d                if   trident i test browserMatch 1              var msieMatch     brv        d      g exec ua                 data name    msie           data version   msieMatch 1             else if  operaMatch            data name    opera           data version   operaMatch 1             else if  browserMatch 1       safari             var safariVersionMatch   ua match  version     d      i           data name    safari           data version   safariVersionMatch 1             else           data name   browserMatch 1           data version   browserMatch 2              var versionParts           if  data version            var versionPartsMatch   data version match    d   g                 for  var i 0  i  lt  versionPartsMatch length  i                  versionParts push versionPartsMatch i                      if  versionParts length  gt  0    data majorVersion   versionParts 0               data name   data name      unknown browser name        data version             full  data version      unknown full browser version            parts  versionParts          major  versionParts length  gt  0   versionParts 0      unknown major browser version               return data       It can then be used like this   var brData   getBrowserData window navigator    navigator   console log  name      brData name   console log  major version      brData version major      etc

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I use this to get de Name and number  int  of the version of the actual browser    x000D   x000D  function getInfoBrowser     x000D      var ua   navigator userAgent  tem  x000D      M   ua match   opera chrome safari firefox msie trident           s   d   i         x000D      if   trident i test M 1      x000D          tem     brv       d   g exec ua         x000D          return   name   Explorer   version  parseInt  tem 1             x000D        x000D      if  M 1       Chrome     x000D          tem   ua match   b OPR Edge     d      x000D          if  tem    null    let app   tem slice 1  toString   split       return   name  app 0  replace  OPR    Opera    version  parseInt app 1        x000D        x000D      M   M 2     M 1   M 2      navigator appName  navigator appVersion   -     x000D      if   tem   ua match  version    d   i      null  M splice 1  1  tem 1    x000D      return   x000D          name  M 0   x000D          version  parseInt M 1   x000D         x000D    x000D   x000D  function getBrowser    x000D    let info   getInfoBrowser    x000D        i-name   html info name   x000D        i-version   html info version   x000D    x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   x000D   lt input type  button  onclick  getBrowser     value  Get Info Browser   gt  x000D   lt hr  gt  x000D  Name   lt span id  i-name  gt  lt  span gt  lt br  gt  x000D  Version   lt span id  i-version  gt  lt  span gt  x000D   x000D   x000D    This run in   Chrome   Firefox   Safari   Internet Explorer     9    Opera   Edge  For me

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Detecting Browser and Its version This code snippet is based on the article from MDN  Where they gave a brief hint about various keywords that can be used to detect the browser name   I have done few changes to detect browsers like Edge and UCBrowser  x000D   x000D  getBrowser        gt        const userAgent   navigator userAgent      let browser    unkown          Detect browser name     browser     ucbrowser i  test userAgent     UCBrowser    browser      browser     edg i  test userAgent     Edge    browser      browser     googlebot i  test userAgent     GoogleBot    browser      browser     chromium i  test userAgent     Chromium    browser      browser     firefox fxios i  test userAgent   amp  amp     seamonkey i  test userAgent     Firefox    browser      browser       msie trident i  test userAgent   amp  amp     ucbrowser i  test userAgent     IE    browser      browser     chrome crios i  test userAgent   amp  amp     opr opera chromium edg ucbrowser googlebot i  test userAgent     Chrome    browser       browser     safari i  test userAgent   amp  amp     chromium edg ucbrowser chrome crios opr opera fxios firefox i  test userAgent     Safari    browser      browser     opr opera i  test userAgent     Opera    browser          detect browser version     switch  browser            case  UCBrowser   return    browser    browserVersion userAgent   ucbrowser      d      i             case  Edge   return    browser    browserVersion userAgent   edge edga edgios edg      d      i             case  GoogleBot   return    browser    browserVersion userAgent   googlebot      d      i             case  Chromium   return    browser    browserVersion userAgent   chromium      d      i             case  Firefox   return    browser    browserVersion userAgent   firefox fxios      d      i             case  Chrome   return    browser    browserVersion userAgent   chrome crios      d      i             case  Safari   return    browser    browserVersion userAgent   safari      d      i             case  Opera   return    browser    browserVersion userAgent   opera opr      d      i             case  IE   const version   browserVersion userAgent   trident      d      i                  IE version is mapped using trident version                 IE 8 0   Trident 4 0  IE 9 0   Trident 5 0             return version      browser    parseFloat version    4 0        browser  7 0           default  return  unknown 0 0 0 0            browserVersion    userAgent regex    gt        return userAgent match regex    userAgent match regex  2    null     console log getBrowser     x000D   x000D   x000D

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Adding my own implementation of Hermann s answer  I needed OS detection so that s been added  Also includes some ES6 code  because we have a transpiler  that you might need to ES5-ify   detectClient         let nav   navigator appVersion          os    unknown           client         gt                let agent   navigator userAgent                  engine   agent match   opera chrome safari firefox msie trident           s   d   i                         build               if  trident i test engine 1                     build     brv       d   g exec agent                         return  browser  IE   version  build 1                                      if engine 1       Chrome                    build   agent match   bOPR    d                       if build     null                        return  browser   Opera   version  build 1                                                 engine   engine 2     engine 1   engine 2      navigator appName  nav   -                  if  build   agent match  version    d   i       null                    engine splice 1  1  build 1                               return                 browser  engine 0                 version  engine 1                                    switch  true            case nav indexOf  Win    gt  -1              os    Windows           break          case nav indexOf  Mac    gt  -1              os    MacOS           break          case nav indexOf  X11    gt  -1              os    UNIX           break          case nav indexOf  Linux    gt  -1              os    Linux           break                     client os   os      return client      Returns  Object  browser   Chrome   version   50   os   UNIX

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This is an improvement on Kennebec s answer    x000D   x000D  function get browser     x000D      var ua navigator userAgent tem M ua match   opera chrome safari firefox msie trident           s   d   i          x000D      if  trident i test M 1     x000D          tem   brv       d   g exec ua          x000D          return  name  IE  version  tem 1         x000D               x000D      if M 1     Chrome    x000D          tem ua match   bOPR Edge    d     x000D          if tem  null     return  name  Opera   version tem 1     x000D               x000D      M M 2    M 1   M 2     navigator appName  navigator appVersion   -     x000D      if  tem ua match  version    d   i    null   M splice 1 1 tem 1     x000D      return   x000D        name  M 0   x000D        version  M 1  x000D         x000D     x000D   x000D  var browser get browser       browser name    Chrome  x000D                                browser version    40  x000D   x000D  console log browser   x000D   x000D   x000D        This way you can shield yourself from the obscurity of the code

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function BrowserCheck         var N  navigator appName  ua  navigator userAgent  tem      var M  ua match   opera chrome safari firefox msie trident     s      d     d     i       if M  amp  amp   tem  ua match  version       d    i     null   M 2  tem 1        M  M   M 1   M 2     N  navigator appVersion  -         return M      This will return an array  first element is the browser name  second element is the complete version number in string format

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The bowser JavaScript library offers this functionality     if  bowser msie  amp  amp  bowser version  lt   6      alert  Hello China        It seems to be well maintained

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Here is the java version for somemone who whould like to do it on server side using the String returned by HttpServletRequest getHeader  User-Agent     It is working on the 70 different browser configuration I used for testing   public static String decodeBrowser String userAgent        userAgent  userAgent toLowerCase        String name    unknown       String version    0 0       Matcher userAgentMatcher   USER AGENT MATCHING PATTERN matcher userAgent       if  userAgentMatcher find            name   userAgentMatcher group 1         version   userAgentMatcher group 2         if   trident  equals name             name    msie           Matcher tridentVersionMatcher   TRIDENT MATCHING PATTERN matcher userAgent           if  tridentVersionMatcher find                version   tridentVersionMatcher group 1                               return name         version         private static final Pattern USER AGENT MATCHING PATTERN Pattern compile   opera chrome safari firefox msie trident              s     d            private static final Pattern TRIDENT MATCHING PATTERN Pattern compile    brv        d       d

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For chromium browser is so simple  Version   navigator userAgentData brands 0  version Browser Name   navigator userAgentData brands 0  brand

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jQuery can handle this quite nice  jQuery browser   var ua     browser  if   ua mozilla  amp  amp  ua version slice 0 3      1 9          alert   Do stuff for firefox 3         EDIT  As Joshua wrote in his comment below  jQuery browser property is no longer supported in jQuery since version 1 9  read jQuery 1 9 release notes for more details   jQuery development team recommends using more complete approach like adapting UI with Modernizr library

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I want to share this code I wrote for the issue I had to resolve  It was tested in most of the major browsers and works like a charm  for me   It may seems that this code is very similar to the other answers but it modifyed so that I can use it insted of the browser object in jquery which missed for me recently  of course it is a combination from the above codes  with little improvements from my part I made    function    ua    var M   ua match   opera chrome safari firefox msie trident           s   d   i             tem       res   if  trident i test M 1         tem     brv       d   g exec ua             res    IE      tem 1            else if M 1       Chrome        tem   ua match   b OPR Edge     d          if tem    null           res   tem slice 1  join      replace  OPR    Opera        else         res    M 1   M 2      else       M   M 2    M 1   M 2      navigator appName  navigator appVersion   -         if  tem   ua match  version    d   i      null  M   M splice 1  1  tem 1        res   M     res   typeof res      string   res split        res     browser         name  res 0       version  res 1       msie   msie ie i test res 0        firefox   firefox i test res 0        opera   opera i test res 0        chrome   chrome i test res 0        edge   edge i test res 0         typeof jQuery     undefined   jQuery   window    navigator userAgent     console log   browser name    browser version    browser msie       if IE 11 output is  IE 11 true

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In pure Javascript you can do a RegExp match on the navigator userAgent to find the Firefox version   var uMatch   navigator userAgent match  Firefox               ffVersion  if  uMatch  amp  amp  uMatch length  gt  1        ffVersion   uMatch 1       ffVersion will be undefined if not a Firefox browser   See working example   x2192

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For any PWA application using angular you can put the code to check if browser is supported or not in body section of index html -   lt body gt       lt div id  browser  gt  lt  div gt       lt script gt          var operabrowser   true          operabrowser    navigator userAgent indexOf  Opera Mini    gt  -1           if  operabrowser                txt     lt p gt Browser not supported use different browser    lt  p gt                document getElementById  browser   innerHTML   txt                 lt  script gt   lt  body gt

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var nVer   navigator appVersion  var nAgt   navigator userAgent  var browserName   navigator appName  var fullVersion        parseFloat navigator appVersion   var majorVersion   parseInt navigator appVersion  10   var nameOffset  verOffset  ix      In Opera 15   the true version is after  OPR    if   verOffset   nAgt indexOf  OPR        -1        browserName    Opera       fullVersion   nAgt substring verOffset   4        In older Opera  the true version is after  Opera  or after  Version  else if   verOffset   nAgt indexOf  Opera       -1        browserName    Opera       fullVersion   nAgt substring verOffset   6       if   verOffset   nAgt indexOf  Version       -1          fullVersion   nAgt substring verOffset   8        In MSIE  the true version is after  MSIE  in userAgent else if   verOffset   nAgt indexOf  MSIE       -1        browserName    Microsoft Internet Explorer       fullVersion   nAgt substring verOffset   5        In Chrome  the true version is after  Chrome   else if   verOffset   nAgt indexOf  Chrome       -1        browserName    Google Chrome       fullVersion   nAgt substring verOffset   7        In Safari  the true version is after  Safari  or after  Version   else if   verOffset   nAgt indexOf  Safari       -1        browserName    Safari       fullVersion   nAgt substring verOffset   7       if   verOffset   nAgt indexOf  Version       -1          fullVersion   nAgt substring verOffset   8        In Firefox  the true version is after  Firefox   else if   verOffset   nAgt indexOf  Firefox       -1        browserName    Mozilla Firefox       fullVersion   nAgt substring verOffset   8        In most other browsers   name version  is at the end of userAgent  else if   nameOffset   nAgt lastIndexOf        1   lt   verOffset   nAgt lastIndexOf              browserName   nAgt substring nameOffset  verOffset       fullVersion   nAgt substring verOffset   1       if  browserName toLowerCase      browserName toUpperCase              browserName   navigator appName             trim the fullVersion string at semicolon space if present if   ix   fullVersion indexOf          -1  fullVersion   fullVersion substring 0  ix   if   ix   fullVersion indexOf          -1  fullVersion   fullVersion substring 0  ix    majorVersion   parseInt      fullVersion  10   if  isNaN majorVersion         fullVersion        parseFloat navigator appVersion       majorVersion   parseInt navigator appVersion  10

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Look at navigator userAgent - Firefox xxx xxx xxx is specified right at the end

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Use this  http   www quirksmode org js detect html  alert BrowserDetect browser      will say  Firefox  alert BrowserDetect version      will say  3  or  4

[javascript] How can you detect the version of a browser?

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