Thay đổi User Agent mặc định của Firefox

1. Open file:

C:\Documents and Settings\username\Application Data\Mozilla\Firefox\Profiles\3vfugy1g.default\prefs.js

2. Add the following line:

user_pref(“general.useragent.override”, “Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)“);

3. Save and close prefs.js.
4. Restart your Firefox browser.
5. Enjoy your self.