Detect all Firefox versions in JS

Question

How to detect Firefox in JavaScript  I want to detect all versions of Firefox

User · Answer

the best solution for me     x000D   x000D  function GetIEVersion     x000D    var sAgent   window navigator userAgent  x000D    var Idx   sAgent indexOf  MSIE    x000D       If IE  return version number  x000D    if  Idx  gt  0  x000D      return parseInt sAgent substring Idx  5  sAgent indexOf      Idx     x000D   x000D       If IE 11 then look for Updated user agent string  x000D    else if    navigator userAgent match  Trident  7      x000D      return 11  x000D   x000D    else x000D      return 0    It is not IE x000D   x000D    x000D  if  GetIEVersion    gt  0   x000D      alert  This is IE     GetIEVersion     x000D     else   x000D      alert  This no is IE     x000D        x000D   x000D   x000D

User · Answer

here it it  var ffversion    18   var is firefox   navigator userAgent toLowerCase   indexOf  firefox   ffversion   gt  -1  alert is firefox

User · Answer

This will detect any version of Firefox   var isFirefox   navigator userAgent toLowerCase   indexOf  firefox    gt  -1    more specifically   if navigator userAgent toLowerCase   indexOf  firefox    gt  -1           Do Firefox-related activities     You may want to consider using feature-detection ala Modernizr  or a related tool  to accomplish what you need

User · Answer

If you d like to know what is the numeric version of FireFox you can use the following snippet   var match   window navigator userAgent match  Firefox    0-9         var ver   match   parseInt match 1     0

User · Answer

This script detects all versions of Firefox  for Desktop  from version 1 to 46    It s the third time I ve tried to answer this question on StackOverflow because I kept finding new ways to break my script  However  I think it s working now  It s a great exercise to learn about Firefox features and interesting to see how things have evolved  The script can be rewritten with different features  I chose ones I thought would be most useful  I would love for someone else to rewrite with other more useful features and post here  and compare results   I placed the script in a try statement in case the user has any disabled settings in about config  Otherwise I tested on every version of Firefox and it detects each one  I gave a brief description of what each feature is used for in the comments  I would like to do this for Webkit too but find the documentation not as good  Mozilla has easy to download previous versions and detailed releases    x000D   x000D     Element to display version x000D  var outputVersion   document getElementById  displayFoxVersion    x000D   x000D  try   x000D         Match UserAgent string with Firefox Desktop x000D         Detect hybrid Gecko browsers and mobile x000D      if  navigator userAgent match  firefox i   amp  amp  x000D           navigator userAgent match  mobi tablet fennec android netscape seamonkey iceweasel iceape icecat waterfox gnuzilla shadowfox swiftfox i     x000D   x000D             Create Element and Array to test availability   x000D          var createdElement   document createElement  div    x000D              createdArray       x000D              firefoxVersion    0   x000D   x000D             Firefox 1 0 released November 9  2004  x000D             Check a current feature as being true  or NOT undefined  x000D             AND check future features as EQUAL undefined x000D          if  typeof window alert      undefined   amp  amp  x000D              typeof window XPCNativeWrapper      undefined   amp  amp  x000D              typeof window URL      undefined     x000D              firefoxVersion    1   x000D            x000D   x000D             Firefox 1 5 released October 15  2003  x000D             XPCNativeWrapper used to create security wrapper x000D          else if  typeof window XPCNativeWrapper      undefined   amp  amp  x000D              typeof window globalStorage      undefined   amp  amp  x000D              typeof window devicePixelRatio      undefined   amp  amp  x000D              typeof createdElement style animation      undefined   amp  amp  x000D              typeof document querySelector      undefined     x000D              firefoxVersion    1 5   x000D            x000D   x000D             Firefox 2 released October 24  2006 x000D             globalStorage later deprecated in favor of localstorage x000D          else if  typeof window globalStorage      undefined   amp  amp  x000D              typeof window postMessage      undefined     x000D              firefoxVersion    2   x000D            x000D   x000D             Firefox 3 released June 17  2008 x000D             postMessage for cross window messaging x000D          else if  typeof window postMessage      undefined   amp  amp  x000D              typeof document querySelector      undefined     x000D              firefoxVersion    3   x000D            x000D   x000D             Firefox 3 5 released June 30  2009 x000D             querySelector returns list of the elements from document x000D          else if  typeof document querySelector      undefined   amp  amp  x000D              typeof window mozRequestAnimationFrame      undefined   amp  amp  x000D              typeof Reflect      undefined     x000D              firefoxVersion    3 5   x000D            x000D   x000D             Firefox 4 released March 22  2011 x000D             window URL is Gecko  Webkit is window webkitURL  manages object URLs x000D          else if  typeof window URL      undefined   amp  amp  x000D              typeof createdElement style MozAnimation      undefined     x000D              firefoxVersion    4   x000D            x000D   x000D             After April 2011 releases every six weeks on Tuesday x000D   x000D             Firefox 5 released June 21  2011 x000D             style MozAnimation for CSS animation  renamed to style animation x000D          else if  typeof createdElement style MozAnimation      undefined   amp  amp  x000D              typeof WeakMap      undefined     x000D              firefoxVersion    5   x000D            x000D   x000D             Firefox 6 released August 16  2011 x000D             WeakMap collects key value pairs weakly referenced x000D          else if  typeof WeakMap      undefined   amp  amp  x000D              typeof createdElement style textOverflow      undefined     x000D              firefoxVersion    6   x000D            x000D   x000D             Firefox 7 released September 27  2011 x000D             textOverflow manages overflowed non displayed content x000D          else if  typeof createdElement style textOverflow      undefined   amp  amp  x000D              typeof createdElement insertAdjacentHTML      undefined     x000D              firefoxVersion    7   x000D            x000D   x000D             Firefox 8 released November 8  2011 x000D             insertAdjacentHTML parses as HTML and inserts into specified position x000D             faster than direct innerHTML manipulation and x000D             appends without affecting other elements under the same parent x000D          else if  typeof createdElement insertAdjacentHTML      undefined   amp  amp  x000D              typeof navigator doNotTrack      undefined     x000D              firefoxVersion    8   x000D            x000D   x000D             Firefox 9 released December 20  2011 x000D             mozIndexedDB dropped ver 16  renamed window indexedDB  x000D             IndexDB improved functionality than localstorage x000D          else if  typeof window mozIndexedDB      undefined   amp  amp  x000D              typeof document mozFullScreenEnabled      undefined     x000D              firefoxVersion    9   x000D            x000D   x000D             Firefox 10 released January 31  2012 x000D             mozFullScreenEnabled reports if full-screen mode is available x000D          else if  typeof document mozFullScreenEnabled      undefined   amp  amp  x000D              typeof window mozCancelAnimationFrame      undefined   amp  amp  x000D              typeof Reflect      undefined     x000D              firefoxVersion    10   x000D            x000D   x000D             Firefox 11 released March 13  2012 x000D             mozCancelAnimationFrame prior to Firefox 23 prefixed with moz x000D             Cancels an animation frame request x000D          else if  typeof window mozCancelAnimationFrame      undefined   amp  amp  x000D              typeof createdElement style MozTextAlignLast      undefined     x000D              firefoxVersion    11   x000D            x000D   x000D             Firefox 12 released April 24  2012 x000D             MozTextAlignLast how the last line is aligned x000D          else if  typeof createdElement style MozTextAlignLast      undefined   amp  amp  x000D              typeof createdElement style MozOpacity      undefined     x000D              firefoxVersion    12   x000D            x000D   x000D             Firefox 13 released June 5  2012 x000D             MozOpacity dropped from this version x000D          else if  typeof createdElement style MozOpacity      undefined   amp  amp  x000D              typeof window globalStorage      undefined     x000D              firefoxVersion    13   x000D            x000D   x000D             Firefox 14 released June 26  2012 x000D             globalStorage dropped from this version x000D          else if  typeof window globalStorage      undefined   amp  amp  x000D              typeof createdElement style borderImage      undefined   amp  amp  x000D              typeof document querySelector      undefined     x000D              firefoxVersion    14   x000D            x000D   x000D             Firefox 15 released August 28  2012 x000D             borderImage allows drawing an image on the borders of elements x000D          else if  typeof createdElement style borderImage      undefined   amp  amp  x000D              typeof createdElement style animation      undefined     x000D              firefoxVersion    15   x000D            x000D   x000D             Firefox 16 released October 9  2012 x000D             animation was MozAnimation x000D          else if  typeof createdElement style animation      undefined   amp  amp  x000D              typeof createdElement style iterator      undefined   amp  amp  x000D              typeof Math hypot      undefined     x000D              firefoxVersion    16   x000D            x000D   x000D             Firefox 17 released November 20  2012 x000D             version 27 drops iterator and renames italic x000D             Used to iterate over enumerable properties of an object x000D          else if  typeof createdElement style iterator      undefined   amp  amp  x000D              typeof window devicePixelRatio      undefined     x000D              firefoxVersion    17   x000D            x000D   x000D             Firefox 18 released January 8  2013 x000D             devicePixelRatio returns ratio of one vertical pixel between devices x000D          else if  typeof window devicePixelRatio      undefined   amp  amp  x000D              typeof window getInterface      undefined   amp  amp  x000D              typeof createdElement style mixBlendMode      undefined     x000D              firefoxVersion    18   x000D            x000D   x000D             Firefox 19 released February 19  2013 x000D             getInterface dropped and renamed in version 32 x000D             Retrieves specified interface pointers x000D          else if  typeof window getInterface      undefined   amp  amp  x000D              typeof Math imul      undefined     x000D              firefoxVersion    19   x000D            x000D   x000D             Firefox 20 released April 2  2013 x000D             Math imul provides fast 32 bit integer multiplication x000D          else if  typeof Math imul      undefined   amp  amp  x000D              typeof window crypto getRandomValues      undefined     x000D              firefoxVersion    20   x000D            x000D   x000D             Firefox 21 released May 14  2013 x000D             getRandomValues lets you get cryptographically random values x000D          else if  typeof window crypto getRandomValues      undefined   amp  amp  x000D              typeof createdElement style flex      undefined     x000D              firefoxVersion    21   x000D            x000D   x000D             Firefox 22 released June 25  2013 x000D             flex can alter dimensions to fill available space x000D          else if  typeof createdElement style flex      undefined   amp  amp  x000D              typeof window cancelAnimationFrame      undefined     x000D              firefoxVersion    22   x000D            x000D   x000D             Firefox 23 released August 6  2013 x000D             cancelAnimationFrame was mozCancelAnimationFrame x000D          else if  typeof window cancelAnimationFrame      undefined   amp  amp  x000D              typeof document loadBindingDocument      undefined   amp  amp  x000D              typeof Math trunc      undefined     x000D              firefoxVersion    23   x000D            x000D   x000D             Firefox 24 released September 17  2013 x000D             loadBindingDocument dropped x000D             loadBindingDocument reintroduced in 25 then dropped again in 26  x000D          else if  typeof document loadBindingDocument      undefined   amp  amp  x000D              typeof Math trunc      undefined     x000D              firefoxVersion    24   x000D            x000D   x000D             Firefox 25 released October 29  2013 x000D             Math trunc returns number removing fractional digits x000D          else if  typeof Math trunc      undefined   amp  amp  x000D              typeof document loadBindingDocument      undefined     x000D              firefoxVersion    25   x000D            x000D   x000D             Firefox 26 released December 10  2013 x000D             loadBindingDocument dropped x000D          else if  typeof Math trunc      undefined   amp  amp  x000D              typeof Math hypot      undefined     x000D              firefoxVersion    26   x000D            x000D   x000D             Firefox 27 released February 4  2014 x000D             Math hypot returns square root of the sum of squares x000D          else if  typeof Math hypot      undefined   amp  amp  x000D              typeof createdArray entries      undefined     x000D              firefoxVersion    27   x000D            x000D   x000D             Firefox 28 released March 18  2014 x000D             entries returns key value pairs for arrays x000D          else if  typeof createdArray entries      undefined   amp  amp  x000D              typeof createdElement style boxSizing      undefined     x000D              firefoxVersion    28   x000D            x000D   x000D             Firefox 29 released April 29  2014 x000D             boxSizing alters CSS box model  calculates width and height of elements x000D          else if  typeof createdElement style boxSizing     undefined   amp  amp  x000D              typeof createdElement style backgroundBlendMode      undefined     x000D              firefoxVersion    29   x000D            x000D   x000D             Firefox 30 released June 10  2014 x000D             backgroundBlendMode blends elements background images x000D          else if  typeof createdElement style backgroundBlendMode      undefined   amp  amp  x000D              typeof createdElement style paintOrder      undefined     x000D              firefoxVersion    30   x000D            x000D   x000D             Firefox 31 released July 22  2014 x000D             paintOrder specifies the order fill  stroke  markers of shape or element x000D          else if  typeof createdElement style paintOrder      undefined   amp  amp  x000D              typeof createdElement style mixBlendMode      undefined     x000D              firefoxVersion    31   x000D            x000D   x000D             Firefox 32 released September 2  2014 x000D             mixBlendMode how an element should blend  x000D          else if  typeof createdElement style mixBlendMode      undefined   amp  amp  x000D              typeof Number toInteger      undefined     x000D              firefoxVersion    32   x000D            x000D   x000D             Firefox 33 released October 14  2014 x000D             numberToIntger dropped  used to convert values to integer x000D          else if  typeof Number toInteger      undefined   amp  amp  x000D              typeof createdElement style fontFeatureSettings      undefined     x000D              firefoxVersion    33   x000D            x000D   x000D             Firefox 34 released December 1  2014 x000D             fontFeatureSettings control over advanced typographic features x000D          else if  typeof createdElement style fontFeatureSettings      undefined   amp  amp  x000D              typeof navigator mozIsLocallyAvailable      undefined     x000D              firefoxVersion    34   x000D            x000D   x000D             Firefox 35 released January 13  2015 x000D             mozIsLocallyAvailable dropped x000D          else if  typeof navigator mozIsLocallyAvailable      undefined   amp  amp  x000D              typeof createdElement style MozWindowDragging      undefined     x000D              firefoxVersion    35   x000D            x000D   x000D             Firefox 36 released February 24  2015 x000D             quote returns a copy of the string x000D          else if  typeof String quote      undefined   amp  amp  x000D              typeof createdElement style MozWindowDragging      undefined     x000D              firefoxVersion    36   x000D            x000D   x000D             Firefox 37 released March 31  2015 x000D             quote quickly dropped x000D          else if  typeof String quote      undefined   amp  amp  x000D              typeof createdElement style rubyPosition      undefined     x000D              firefoxVersion    37   x000D            x000D   x000D             Firefox 38 released May 12  2015 x000D             rubyPosition defines position of a ruby element relative to its base element x000D          else if  typeof createdElement style rubyPosition      undefined   amp  amp  x000D              typeof window Headers      undefined     x000D              firefoxVersion    38   x000D            x000D   x000D             Firefox 39 released July 2  2015 x000D             Headers allows us to create our own headers objects  x000D          else if  typeof window Headers      undefined   amp  amp  x000D              typeof Symbol match      undefined     x000D              firefoxVersion    39   x000D            x000D   x000D             Firefox 40 released August 11  2015 x000D             match matches a regular expression against a string x000D          else if  typeof Symbol match      undefined   amp  amp  x000D              typeof Symbol species      undefined     x000D              firefoxVersion    40   x000D            x000D   x000D             Firefox 41 released September 22  2015 x000D             species allows subclasses to over ride the default constructor x000D          else if  typeof Symbol species      undefined   amp  amp  x000D              typeof Reflect      undefined     x000D              firefoxVersion    41   x000D            x000D   x000D             Firefox 42 released November 3  2015 x000D             mozRequestAnimationFrame and mozFullScreenEnabled dropped x000D             Reflect offers methods for interceptable JavaScript operations x000D          else if  typeof Reflect      undefined   amp  amp  x000D              typeof window screen orientation      undefined     x000D              firefoxVersion    42   x000D            x000D   x000D             Firefox 43 released December 15  2015 x000D             orientation is mozOrientation in B2G and Android x000D          else if  typeof window screen orientation      undefined   amp  amp  x000D              typeof document charset      undefined     x000D              firefoxVersion    43   x000D            x000D   x000D             Firefox 44 released January 26  2016 x000D             charset is for legacy  use document characterSet x000D          else if  typeof document charset      undefined   amp  amp  x000D              typeof window onstorage      undefined     x000D              firefoxVersion    44   x000D            x000D   x000D             Firefox 45 released March 8  2016 x000D             onstorage contains an event handler that runs when the storage event fires x000D          else if  typeof window onstorage      undefined   amp  amp  x000D              typeof window onabsolutedeviceorientation      undefined     x000D              firefoxVersion    45   x000D            x000D   x000D             Firefox 46 - beta x000D             onabsolutedeviceorientation x000D          else if  typeof window onabsolutedeviceorientation      undefined     x000D              firefoxVersion    46 or above   x000D            x000D   x000D             Else could not verify x000D          else   x000D              outputVersion innerHTML    Could not verify Mozilla Firefox   x000D            x000D   x000D             Display Firefox version x000D          outputVersion innerHTML    Verified as Mozilla Firefox     firefoxVersion  x000D   x000D             Else not detected x000D        else   x000D          outputVersion innerHTML    Mozilla Firefox not detected   x000D        x000D    catch  e    x000D         Statement to handle exceptions x000D      outputVersion innerHTML    An error occured  This could be because the default settings in Firefox have changed  Check about config    x000D    x000D   lt div id  displayFoxVersion  gt  lt  div gt  x000D   x000D   x000D

User · Answer

lt script type  text javascript  gt             var isChrome    Chrome  test navigator userAgent   amp  amp   Google                             Inc  test navigator vendor              var isFirefox                      navigator userAgent toLowerCase   indexOf  firefox    gt  -1             if  isChrome                                document write   lt    link rel  stylesheet                                     href  css chrome css    gt                             else if isFirefox                              document write   lt    link rel  stylesheet                                     href  css Firefox css    gt                             else                              document write   lt    link rel  stylesheet                                      href  css IE css    gt                          lt  script gt    This works perfect for IE Firefox and Chrome

User · Answer

For a long time I have used the alternative     netscape  in window   amp  amp    rv   test navigator userAgent    because I don t trust user agent strings  Some bugs are not detectable using feature detection  so detecting the browser is required for some workarounds   Also if you are working around a bug in Gecko  then the bug is probably also in derivatives of Firefox  and this code should work with derivatives too  Do Waterfox and Pale Moon have  Firefox  in the user agent string

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