it's doing what it's supposed to do

unstable with deezer.com on firefox 123 win64

Very useful add

does nothing in the latest few versions of firefox

If this add-on has a UI, it completely escapes me.

great experience

The option to change the global user agent "Apply (container or window)" doesn't work even on the website "webbrowsertools.com". Tested on Firefox 121.0.

Domain whitelist / blacklist does NOT work

when your bank has stupid expectations of updates switch your agent. Else run a virtual machine

Great at bypassing browser discrimination

Does nothing with Firefox 120/Ubuntu