Does not work. Appears to be abandoned.

Doesn't work.

But this one does:

Full Screen NO Title/URL Bar by Rahul Varale

addons.mozilla.org/en-US/firefox/addon/full-screen-no-title-url-bar/

ctrl shift f does nothing even after restarting firefox, IDK man i followed your provided instructions so you get a dick slap.

Doesn't behave as one would expect, YouTube music opened the album cover in fullscreen instead of the page.

Also it seems to only work when it wants to. Keybind on YouTube music worked the first time, but after moving the window it stopped working, didn't get it to work on other sites.

Not working in latest (12.4) mac monterey os. Even with about:config change.

It simple doesn't work on my macbook (command+shift+F do the old same thing and ctrl+shift+F simpy does nothing)

Not working in macOS catalina, 2021/08/16, FF91,

Not working on Mac, FF 90.0b12

Not working with Mac

Does not work (anymore?) with Ctrl + Shift + F :(

don't work on mac

It does nothing with Control+Shift+F (tested on several website, including example.com)

This is the only fullscreen addon I've found that at least partially works. It will open your tab in fullscreen, but you have to press control-shift-f every single time, and once you are in fullscreen, you can't just logically mouse up to the top to show the bookmarks and tabs you've hidden, just nothing appears.

Doesn't work on Flash game sites that have input bar focused —so it's useless like the userChrome.css trick. Make the full screen trigger without window focus. Nevermind, it's a glitch in Habbo site, I'am back to using this userChrome script: https://www.userchrome.org/what-is-userchrome-css.html