Mozilla/5.0 (Windows NT 5.1 Trident/7.0 rv:11.0) like Gecko Since IE11 is the end of the line for Windows 7, it won't be necessary to change it again. I think to keep things simple, I will be setting Firefox to impersonate IE 11. Windows 7 has a large market share, and any version of Firefox released in the last 4-5 years would likely support the same feature set as IE 11, or at least be compatible with websites that support IE 11. I am pretty sure most developers are still coding for it. Good point! I suppose we should just use the Internet Explorer 11 agent string on Windows XP. So changing User Agents is still just a testing type thing in most cases.

This will cause some sites to then appear to not work properly. This is especially true if that user agent you are using causes the site to send different code for you to use, code that would be usable on the actual browser you were pretending to be. This trick will also be useful on XP, since Firefox will not be updated past version 51 going forward.Įven in modern situations, spoofing the user agent isn't a foolproof method of doing anything.

This proves an artificial browser warning.Īlso, if you visit a website to check the browser, it reports that it is Firefox 53 on XP, even though we know we are running Firefox 48 on Windows 2000. Again, we know that XP cannot really support Firefox 53.Īfter saving, reopen Firefox and go back to Citibank's website. This tells the browser to report Windows XP, and Firefox 53.0. So, we go into about:config, create a string value called, and make the value Mozilla/5.0 (Windows NT 5.1 rv:53.0) Gecko/20100101 Firefox/53.0 I don't recommend Chrome for spoofing, because 1) Chrome does not really work well on 2000, and 2) Chrome can only store user agent changes temporarily, while the Developer Console is open.īy visiting Citibank's website with Firefox 48 (last working on Windows 2000), it says the browser is out of date and not supported. Firefox can be spoofed easily on Windows 2000 and XP. NOTE: I originally posted this in the 2000 forum, but it would also be useful duplicated here since XP has such a large user base.Īs we know, most websites have artificial browser requirements for using their website.

Older versions of firefox for xp