We need the Googlebot

Works well on desktop computers. Does NOT work on Android.

Amazing app. Highly recommended.

あ

super

...

This user agent switcher works well with Firefox Quantum, it modifies the user agent via the HTTP request header and also the JavaScript property navigator.userAgent.
I noticed it does not take effect on https://addons.mozilla.org, I don't know if it is a feature or a bug.

Recommendation: instead of displaying deprecated mobile operating systems like Symbian and Firefox OS, the addon should add Sailfish OS to the list (maybe BlackBerry also).

It would be good to add the possibility to enter multiple custom user agent instead of just one, like this addon (not supported with latest Firefox): https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher/

I was looking for a Firefox 57-compatible replacement for UA-Control, which let me map different domains to different user-agents. This at least lets me do that with one alternate user-agent, so it's a lot better than nothing, however I wish it was more powerful.

Useful, user friendly and beautyfull user interface

This add-on save me many times but I think is better if integrated on the core of Developer tools...

the user agents should be updated but other than that it's near perfect

Works perfectly, however, as other people have said, it would be awesome if the browsers were up to date by default.

Another great feature would be specific OS, like Ubuntu, Windows 7, XP, Fedora etc, instead of Linux/Windows only.

nice prog :)
but will it update automatically the faked devices, browsers and OSs?

My mobile device is still Android Nexus 5 - this is too old for many sites...

How can i set UAS to the newest devices?
thx

Is it possible to add user agents of the Search bots like bing and google?

I dropped the ancient Useragent Switcher for this addon. I like that it's easy for beginners and it keep it's setting after browser restarts.

There's one major annoyance.

There's only 1 version of the OS and browser you can select.

If for example we could pick between Win XP, Win Vista, Win 7, Win 8 and Win 10 and Firefox 2, Firefox 39, Firefox 52 etc.

This addon would be perfect.

Can't Edit User-Agent string