Rated 5 out of 5 stars

For all of you need to don't have reset the user agent at firefox start up follow this:
Search prefs.js on your system and opening with worpad.
Add this to the last line:
user_pref("useragentswitcher.reset.onclose", false);
With that string you don't have reset on user agent after restarting.
And if after you doing that firefox is not start ( to me and my friends dosn't happens.
anyway you can repair that deleting that line:
general.useragent.override

Rated 5 out of 5 stars

I love user agent switcher.
With user agent switcher you can test sites browser compatibilities.
With user agent switcher you can make very much things example doing things on sites that are allowed only on mobile phones example: iphone.
With user agent switcher you can hide you'r identity on sites example change the language browser and use user agent switcher with a browser list xml + using a vpn or proxy you are completely stealth thanks to user agent switcher.
LONG LIFE TO USER AGENT SWITCHER