Horrible interface and half the agents don't work; there's also no way to add, update, or customize this at all.

The previous version was much better, you cannot alter the OS default list, and the addon do not permit that I change for example BSD as Solaris.

Not working in android

あ

Firefox disabled this extension because according to him it is obsolete, but why Firefox does not do its own business???

it makes douban.com website broken.
can't click on stars with this add-on
don't understand why
try this site https://movie.douban.com/subject/26821003/ and click 「想看」or「在看」or「看过」button，and click on stars in the window pop out. the stars should be lightend up at normal .

Excellente extension

work well

super

Не работает на Android 7 Firefox 57.0.4

It really works! I loved it..

9/10

...

Very useful add on!! 100% recomended

Useless for developers. There's very few predefined user agents and there's no easy way to add your own

You'd think there's be an option to fake your Firefox version, too. I remember there being an extension that let me do this and thought this was it. Too bad.