Dude you just stole my heart with this addon. This is working perfectly as I wanted to. I want to add more User-Agents and OS and others for that I need your kind help. I have emailed you to the support email listed for this addon page.

*** I'm seeking for your attention dear admin of this addon sir ***

I need your kind help to add more User-Agents, OS, Versions etc.

Can you publish an Updated Version soon? Or else You can help me to add manually?
I'm really not aware of user-agents for different browsers and OS.

*** Waiting for your response ***

Unlike some other apps I saw suggested from Firefox & others results from Apps search & Google search this 1 actually was to UPLOAD images to certain sites like Instagram (90% of the others were to download images already posted on sites by other people instead of using screenshot apps, almost complete opposite of what I was searching for). And even better you explained how it works & how to use it RIGHT in certain internet servers. That helped a lot more than what I got from Google (lol. Some results were even outdated/impossible to use now). This saved me time & even money because now I don't have to go buy a smartphone just to actually/fully use a website (or 2+).

Seems to be one of the more frequently updated UA changing extensions. Keep it up!

Love it that you can add custom strings (just use Ctrl + V to paste). It works very well. It doesn't fool the Firefox add on site, but I see this is a Firefox policy, and the developer has provided a work around. This is a terrific, easy to understand and use add on. It does fool Google and all the user-agent testing sites.

很好用，完美解决IE11兼容问题

Does the job very well.
It would be a nice addition to reset the Switcher when the browser closes.
well done!

works perfect, great Addon!

Finally, I can switch entirely to using Firefox on Android! Google Maps and Google Voice give me all the menu options now, not the nerfed versions they serve to us Firefox Android users! It even does site-specific domains! Erm, I only wish I could specify for it to work only on certain Google sites, Maps and Voice (www.google.com/maps and www.google.com/voice), but not Google Search. Unfortunately, Google redirects to these addresses and then the extension doesn't catch these sites.

good