Does its thing but breaks full screen mode

Works well to remove video title in theater mode, despite keeping youtube topbar.
Also breaks fullscreen with added video title

The update seems to be working now. Although, with my setting of 2560 x 1440, there are black bar on both left and right sides. But at least the top and bottom were filled completely.

Was great but seems to not work any more.

1 star, after uninstall videos still open in cinema mode

Doesn't work anymore. Apparently it was updated today (June 29th), so perhaps something broke.

Basically what I wanted.

I M P O R T A N T !
WRECKED [Full Screen] mode (not filling entire display).
Wrecked Player mode settings. Always switches to [Cinema] mode & always resets player's speed to [Normal]. WRECKED, because changed browser's preferences permanently,
_even after disabling and uninstalling extension_ browser now always start videos in [Cinema] mode & resets speed to [Normal]
Lacks option for disabling automatic switch to cinema mode. I would like to decide myself which video in what mode to watch.
Resuming I must say the extension behavior is HARMFUL!

Works well for me on Firefox 78.0, but breaks Fullscreen mode

no longer works

Thank you so much this addon does exactly what I've been looking for. I've tried 4 other addons that claimed to maximize in-window youtube but none did so nearly as well as your addon does.

I just registered an account to thank you. It works like a charm immediately and improves the video watching experience greatly.

Does not work with Firefox Quantum.

UPDATE: Works great with update! Great addon, thank you!

will be just perfect if this extension fits also to the top of window by used a kind of hover option to see search bar

muito bom agora não preciso ficar colocando o navegador em tela cheia.

doesn't work with firefox quantum