Unable to LogIn or SignIn via Firefox on Twitch.tv

Help / Off-topic
1

Hello guys,

i do not know what i can do to logIn or SignUp myself.
Everytime i try it i get a transparent violet overlay with a x-mark on the top right but there is nothing to type username or password.

Twitch Support.jpg1366×1501 116 KB

I try to clear the cache of my Firefox browser also delete ALL cookies connected with Twitch.
Is there any help except changing the browser to IE or Chrome?

2

Disable your plugins and extensions. Then refresh.

3

Thank u - your solution was right <3!