This might be understandable if they have various sets of blocked/disallowed content depending on local laws, but OTOH I wish they'd more clearly communicate why you're being blocked then.
I've also had trouble logging into Twitch a few times over the last year on Firefox, but the same is true for Paypal. Both of them don't work in a private window without any addons either, and at least for Paypal changing the user agent didn't help. Twitch works fine If I'm already logged into Twitch, same with Paypal. Just the login fails for some reason.
There's other payment options, and I seldomly watch streams anyway.
I tested this and using Librewolf I was stopped from logging on and given the message "Your browser is not supported". Changing the user agent fixes the problem.
Usually it means that OP either uses a "hardened" fork, or did some messing around with about:config like resistFingerprinting, without understanding the ramnifications of such hardening on various web technologies that aren't primarily related to tracking/tracing.
When your browser connects to a website, it will tell the webserver what type of browser you are using in the HTTP headers. This can be used for serving a special web page for browsers with quirks, or it can be used to block certain browsers.
It may look something like this:
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0
But you can use an extension like this one to spoof your user agent and send out one that corresponds to a chromium browser.
Thanks, this works. I can log into Twitch again after changing the user agent. Twitch stopped me from logging on before this change saying "Your browser is not supported". I'm using Librewolf. I suspect we'll be seeing more of this kind of thing.
I remembered the security setting Twitch didn't like, as well. It was "Enable ResistFingerprinting". If it gives you any more trouble, check the LibreWolf section in your settings for that. Same deal: toggle off, login, toggle back on.
I login with Librewolf by disabling resist fingerprinting, then disabling all content blocking extensions, then clearing cookies, then restarting Librewolf. When you login, click "Remember Me" and re-enable everything
You assume the person would never change the password. Someone with that long password is probably security concerned and is likely to change it after some time, even if its once in a year.
Yup, most of my passwords are like 30 characters, and I don't remember any of them except the one to unlock my password manager (and a couple other important ones).
It was doing this to me a while back. Are you using a VPN or using an ad-blocker specifically for Twitch's embedded stream ads? (e.g. TTV-LOL-Pro) The latter work by using proxies and so I think trigger the same sort of effects. Disabled it and it worked fine. It also happened on a Chromium-based browser when I tested it out.
Just a comment: IMO it's not worth using strong passwords on which you depend on privative/unknown security platforms. Who knows how many times they get hacked or have backdoors? Unless they specify they only store the hash I refuse to sacrifice one of my strong passwords.
Edit: To all talking about password managers. I don't believe in single point of failure as a way to go. The fact that i've to explain that xd...
Genuinely terrible advice. Every popularly available password manager service hashes all your passwords, if they have a data breach they have extremely strict reporting compliance and the majority of services will re-hash all your passwords. If youre so extremely concerned about that, host your own.
But what concerns me the most is
Unless they specify they only store the hash I refuse to sacrifice one of my strong passwords.
Keeping all on one password (password manager) is a single point of failure, which i don't like. I mean sacrifice because my brain can only remeber a few 512bytes long passwords (again i don't use password managers because of single point of failure).
How about just using a password manager and create a unique strong password for every website? That way you don't have to store so much in your brain and you get better security on any website. You also don't have to worry about more than one website being breached from reused passwords.
BitWarden is pretty great and is open source and free to use.
You can also self-host it if you don't trust them storing your hashed passwords.