Can't login to Twitch with Firefox (Your browser is not currently supported)

Upon a fresh install of Bazzite I am unable to log into my Twitch user in the included version of Firefox. I've tried clearing cookies/site data to no avail. I get the same error in a new Private Window also. It's probably Twitch's fault for using this kind of asinine browser restriction for their login in the first place, but I'm hoping somebody here might be able to help me find a workaround. Note that streams play just fine, and nothing else is broken. I'm just unable to log into my user. This is very confusing to me since I had no issues logging in with Librewolf on CachyOS previously. Maybe the fact that it's a Flatpak on Bazzite is a contributing factor?

It works on Chrome, but Chrome often becomes unusable because of Wayland+NVIDIA on my hardware, so I'd rather avoid using it if I can.

Solution

Librewolf is at least a good alternative, so that's a workaround that I can live with.

Jump to solution

biebel•7/28/25, 5:33 PM

This sounds like you have changed your user agent or installed a plugin that does that. On https://whatmyuseragent.com/ you can see what user agent info is sent.

What's My User Agent?

Get your users agent string, web browser, opera system, device information and more... Useragent is a small piece of data that is sent by your web browser when accessing a website or application.

Bbiebel This sounds like you have changed your user agent or installed a plugin that doe...

SwimmingCarcassOP•7/28/25, 5:40 PM

Mozilla/5.0 (X11; Linux x86_64; rv:141.0) Gecko/20100101 Firefox/141.0

I made no modifications to my browser before attempting to log in other than installing the extension from my password manager.

biebel•7/28/25, 5:41 PM

I get the same, but have no issue at all logging in.

SwimmingCarcassOP•7/28/25, 5:41 PM

I've tried a bunch of different workarounds from various old reddit threads to no avail. I still can't log in with a clean official mozilla firefox from flathub, but I went ahead and tried on Librewolf (also from flathub), and that actually worked. I'm very confused. You'd think that'd be less supported.

SwimmingCarcassOP•7/28/25, 5:43 PM

I've also opened a ticket with Twitch, but don't expect them to be much help, since their support seems to be mostly manned by AI chatbots.

Solution

SwimmingCarcass•7/28/25, 5:45 PM

Librewolf is at least a good alternative, so that's a workaround that I can live with.

biebel•7/28/25, 5:48 PM

Try it in troubleshoot mode in firefox to see if it's a configuration on your end that's causing it.

Bbiebel Try it in troubleshoot mode in firefox to see if it's a configuration on your en...

SwimmingCarcassOP•7/28/25, 6:04 PM

I did that, and also private window. I really hadn't changed any relevant configuration before attempting to log in, though. That's what so weird about this whole deal.

Can't login to Twitch with Firefox (Your browser is not currently supported)

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