Very usefully.

Plante instantanément Firefox mobile.
Instantly crashes Firefox mobile.

This used to be the most functional useragent-switcher (even if the UI/UX was left wanting), but even this doesn't seem to work anymore. 😕

Although this extension doesn't solve my issue completely (hating how Facebook looks and works), I am able to easily convince FB that my laptop is a mobile device which makes it more tolerable.

I love it, I use the user-agent switcher because sites like Roblox believe firefox is "suspicious" and will serve you 10 Captchas if you are on Firefox

Does not work at all. Sites still see my browser's original version string.

L'idée est bonne mais le gros défaut est que les captchas ne passent pas car le ua dans les iframes n'est pas modifié. Dommage.

excellentai dudes and dudettes

Works in Zen too! :)

Edit: No longer works anymore. Sites that block Firefox users are blocking them again even with this extension set to tell the site I'm on Chrome. :(
Needed to use a site that was silently refusing to let Firefox users log in. Used this extension to tell the site I'm on Chrome. I can log in now. 10/10 Would recommend if you find a site that hates Firefox, this works to bypass it

The only user agent switcher I've found that reliably works. Allows you to apply custom user agent to a specific domain. UI is simple and easy to understand.

The best user agent switcher. Buffering on Youtube magically gone. Compared to using FF by default that YT will buffer every 10 seconds.