The extension used to work fine, until a recent update. Per-container UAs stopped working... Or in fact, the extension as a whole stopped working at all. No changes would make it work again.

🔹It worked well before the new update. 🔹After the new update, all of the multi- account container becomes sharing the same user agent. 🔹I am using portable firefox with multi-ac containers for nearly 3 to 4 years. 🔹After update the new version of user-agent switcher and manager, 🔹all of the containers share the same user agent and cannot set different user agents for each container alternately.

It used to work very well, but recently it didn't work, I was frustrated, I didn't know why, I tried whitelist and blacklist mode, it didn't work, I was using the latest version of firefox, not sure if it was a compatibility issue with the latest version

This addon has taught me that nearly all web sites that supposedly aren't compatible with Firefox actually are compatible. I use this at work, on my android phone, and on my home PC as well. It's an essential addon, in my opinion, and I've had nothing but success.

Its great

It doesn't work.

This doesn't work. I have to manually change the user agent on every startup or time interval. I don't need a data thieving, resource wasting, pretend add-on for that. There is a "Random User-Agent (Switcher)" that works perfectly and is very simple to set up.

cloudflare captcha + youtube are broken with

Must sometimes be disabled for Cloudflare's verification captcha system to work

It works, but apparently, it completely breaks Cloudflare's verification captcha system, so I can't use it.

turns out this extension is injecting scripts into pages, and breaks all cloudflare protected sites

Unfortunately I have discovered that the current version of this add-on triggers the Cloudflare 'Captcha of Death' denying access to hundreds of web-sites and as such I have deactivated it.