Switch firefox to use a different DNS than what is in the windows host file

Question

For example  I have a development site on a different server but I m trying to copy content over from the live site so it d be handy to have the live site in IE and the dev site in FF   I tried FoxyProxy but I can t seem to get it to work

User · Answer

I wonder if you could write a custom rule for Fiddler to do what you want? IE uses no proxy, Firefox points to Fiddler, Fiddler uses custom rule to direct requests to the dev server...

http://www.fiddlertool.com/fiddler/

User · Answer

I am using the SwitchHost extension exactly for this problem  https   addons mozilla org en-US firefox addon 14258  It is easy to configure  and even more easy to switch hosts

User · Answer

What about having different names for your dev and prod servers  That should avoid any confusions and you d not have to edit the hosts file every time

User · Answer

It s now possible  with the DNS over HTTPS function   Open Options  General  scroll to very bottom and open Network Settings   On the very bottom  you can find DNS over HTTPS       You had to use about config before to change this setting  here s for documentation   Type about config in firefox address bar   search for   network trr uri  You can use one of the DNS servers below   Cloudflare  https   cloudflare-dns com dns-query Google  https   dns google dns-query Secure DNS EU  https   doh securedns eu dns-query Quad 9  https   dns quad9 net dns-query   And set network trr mode to 1  Hijacked from here  https   www ghacks net 2018 04 02 configure-dns-over-https-in-firefox

User · Answer

I wonder if you could write a custom rule for Fiddler to do what you want? IE uses no proxy, Firefox points to Fiddler, Fiddler uses custom rule to direct requests to the dev server...

http://www.fiddlertool.com/fiddler/

User · Answer

It s now possible  with the DNS over HTTPS function   Open Options  General  scroll to very bottom and open Network Settings   On the very bottom  you can find DNS over HTTPS       You had to use about config before to change this setting  here s for documentation   Type about config in firefox address bar   search for   network trr uri  You can use one of the DNS servers below   Cloudflare  https   cloudflare-dns com dns-query Google  https   dns google dns-query Secure DNS EU  https   doh securedns eu dns-query Quad 9  https   dns quad9 net dns-query   And set network trr mode to 1  Hijacked from here  https   www ghacks net 2018 04 02 configure-dns-over-https-in-firefox

User · Answer

DNS resolving is usually done at the system level and not at the application level  so you can t normally have one program use one dns and another program use a different dns  I m not aware of any firefox extensions that allow you to use a different dns

User · Answer

Since http proxy protocol is similar to raw http protocol  you can redirect desired traffic to your development server by telling firefox it s a proxy server   two limitations   A  this won t let you use https connections   B  some frameworks  e g  wordpress  don t like this method and redirect the request the wrong way  just copy the following code into a  pac file  enter your site domain and IP address  of course   and switch development production just by changing proxy configuration   function FindProxyForURL url  host        var prox4site              mysite com   PROXY 10 0 1 100 80            www mysite com   PROXY 10 0 1 100 80             return prox4site host      DIRECT

User · Answer

I wonder if you could write a custom rule for Fiddler to do what you want? IE uses no proxy, Firefox points to Fiddler, Fiddler uses custom rule to direct requests to the dev server...

http://www.fiddlertool.com/fiddler/

User · Answer

DNS resolving is usually done at the system level and not at the application level  so you can t normally have one program use one dns and another program use a different dns  I m not aware of any firefox extensions that allow you to use a different dns

User · Answer

What about having different names for your dev and prod servers  That should avoid any confusions and you d not have to edit the hosts file every time

User · Answer

It appears from your question that you already have a second set of DNS servers available that reference the development site instead of the live site   I would suggest that you simply run a standard SOCKS proxy either on that DNS server system or on a low-end spare system and have that system configured to use the development DNS server   You can then tell Firefox to use that proxy instead of downloading pages directly   Doing it this way  the actual DNS lookups will be done on the proxy machine and not on the machine that s running the web browser

User · Answer

I am using the SwitchHost extension exactly for this problem  https   addons mozilla org en-US firefox addon 14258  It is easy to configure  and even more easy to switch hosts

User · Answer

Go to options- Advanced- Network- Settings- Automatic proxy configuration url and enter 8 8 8 8 All you Mozilla traffic uses Google dns now

User · Answer

Since http proxy protocol is similar to raw http protocol  you can redirect desired traffic to your development server by telling firefox it s a proxy server   two limitations   A  this won t let you use https connections   B  some frameworks  e g  wordpress  don t like this method and redirect the request the wrong way  just copy the following code into a  pac file  enter your site domain and IP address  of course   and switch development production just by changing proxy configuration   function FindProxyForURL url  host        var prox4site              mysite com   PROXY 10 0 1 100 80            www mysite com   PROXY 10 0 1 100 80             return prox4site host      DIRECT

User · Answer

What about having different names for your dev and prod servers  That should avoid any confusions and you d not have to edit the hosts file every time

User · Answer

I wonder if you could write a custom rule for Fiddler to do what you want? IE uses no proxy, Firefox points to Fiddler, Fiddler uses custom rule to direct requests to the dev server...

http://www.fiddlertool.com/fiddler/

User · Answer

It appears from your question that you already have a second set of DNS servers available that reference the development site instead of the live site   I would suggest that you simply run a standard SOCKS proxy either on that DNS server system or on a low-end spare system and have that system configured to use the development DNS server   You can then tell Firefox to use that proxy instead of downloading pages directly   Doing it this way  the actual DNS lookups will be done on the proxy machine and not on the machine that s running the web browser

User · Answer

Go to options- Advanced- Network- Settings- Automatic proxy configuration url and enter 8 8 8 8 All you Mozilla traffic uses Google dns now

User · Answer

DNS resolving is usually done at the system level and not at the application level  so you can t normally have one program use one dns and another program use a different dns  I m not aware of any firefox extensions that allow you to use a different dns

User · Answer

I use this to override system s DNS with localserver in about config change this value  network dns forceResolve network dns ipv4OnlyDomains network dns localDomains  with IP address of local DNS server  for exsample 192 168 1 88  Sorry for my english

User · Answer

It appears from your question that you already have a second set of DNS servers available that reference the development site instead of the live site   I would suggest that you simply run a standard SOCKS proxy either on that DNS server system or on a low-end spare system and have that system configured to use the development DNS server   You can then tell Firefox to use that proxy instead of downloading pages directly   Doing it this way  the actual DNS lookups will be done on the proxy machine and not on the machine that s running the web browser

User · Answer

DNS resolving is usually done at the system level and not at the application level  so you can t normally have one program use one dns and another program use a different dns  I m not aware of any firefox extensions that allow you to use a different dns

User · Answer

I use this to override system s DNS with localserver in about config change this value  network dns forceResolve network dns ipv4OnlyDomains network dns localDomains  with IP address of local DNS server  for exsample 192 168 1 88  Sorry for my english

User · Answer

What about having different names for your dev and prod servers  That should avoid any confusions and you d not have to edit the hosts file every time

User · Answer

It appears from your question that you already have a second set of DNS servers available that reference the development site instead of the live site   I would suggest that you simply run a standard SOCKS proxy either on that DNS server system or on a low-end spare system and have that system configured to use the development DNS server   You can then tell Firefox to use that proxy instead of downloading pages directly   Doing it this way  the actual DNS lookups will be done on the proxy machine and not on the machine that s running the web browser

[firefox] Switch firefox to use a different DNS than what is in the windows.host file

Examples related to firefox

Examples related to dns