was useful while it lasted

Works well compared to another UA switcher I've tried, the website whatismybrowser actually gets fooled by the custom UA string, when with the other, it says Firefox on Linux (what I am indeed using) but announcing that it's (ua string). Only one problem. On Firefox forks that use older Firefox versions, this add-on is completely unavailable. Wtf? This is why I have experience with other UA changer add-ons.

I'm so disappointed that you can no longer assign specific user-agents to specific containers. I miss this feature please add it back.
That being said, this is still a great extension to have, probably the best of it's kind.

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

Need support for Android

It works regularly in Mozilla Firefox 129.0B9 X64. It is a pity that manual editing of a list of comparison of domains and UA is carried out only in JSON format, and not in something more accessible to non-specialists.

Upd. 0.6.6 (Oct 8, 2025) and Mozilla Firefox 148.0b12:

1. Selected "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36" from the list.
2. Clicked "Apply (all tabs)".
3. Clicked "Test UA".
4. webbrowsertools.com: "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0".

The extension does not perform its main function.

This plug -in is very good. I like it, but I have a suggestion in terms of the language it can set: I hope it can support (Traditional Chinese) This can make the Chinese population worldwide easier to use it. Thank you 0 . 0

Love this tool, but it seems it breaks some captchas, like cloudflare's.

Not sure if I am the only one but when I use this soundcloud gives me an error, but other then that it works like a charm

A bit unintuitive, but does the job. Bing chat here I come.

does the work but slows down the PC

Extensão muito boa, mas precisa melhorar a interface da extensão para se adequar quando aberto no Firefox para Android, se possível aumente e atualize a lista de agentes de navegação, além é claro crie um submenu de escolha do idioma local de origem do usuário, nas configurações da extensão.