Confusing UI/UX results in mistakes. Why not just make the button image correspond to your useragent instead of the useless logo. I am glad they finally added support for container but now i can no longer set default user agent for all tabs or on a per-window basis. Coupled with Temporary containers addon this makes the addon useless since i have to manually set the user agent for every new tab. Also Shows ads for other addons in the dialogue box.

The only reason i use it is because it is a Firefox "recommended" addon.

Very easy to use, with domain specific filters, including both black and white lists, which is not a very common feature, even on way much bigger extensions.

One "feature" that I didn't like was the self-advertising bar: there is a "lightning" icon that, when clicked, opens an advertisement bar to other products from the same makers, which took me a while to understand that they were not extra functions of this add-on, but external links. The pop-up bubble is definitely not the best place to add that kind of thing.

Doesn't work on most sites

Keep it up!

I think this is the best albeit not perfect User Agent switcher. You can manually edit the version numbers after a bit of Googling to keep up with the latest browser versions. Unfortunately though, if you try to replicate a Chromium browser, it will reveal itself to be a native Firefox browser. I would like to see a User Agent that conceals that too.