Hello,

since recently, I can't login to any of Protonmail products. Going to their website gives me 400 bad request (Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.). I also can't log in to their Firefox extentions anymore. It used to work before without any problems. And I don't have any problems on other browsers, so I assume it has to have something to do with Firefox. I tried to clear the cache and reinstall Firefox, but it doesn't help. Any idea about how can I fix this? Thank you!