Issue with stream when not in full screen mode?

[DeatH_D]

Hi everyone, this is happening when I click on any stream, has been happening since I installed BetterTTV.

[Aaron128l]

From @night on a very similar question:

Stream shrinking with BetterTTV in Firefox

This is a rare condition, and can easily be fixed by resizing the window after it happens or resizing your chat to be wider (which will resize your page on every page load for you).

Stream shrinking with BetterTTV in Firefox

If resizing your browser does not fix the problem, then perhaps you have an additional add-on installed that conflicts with BetterTTV. Try disabling all other Twitch add-ons and seeing if that helps.