This is an amazing extension!! Once you reload the web page after installing the add-on, a button will appear in the corner. When you double click the button, Firefox goes full-screen. The only downside is that it causes PDF rendering on overleaf.com to become non-scrollable -- might it be something easy to fix? Thanks!!

Fantastic extension! Minimalistic, efficient, and adds an essential fullscreen feature which is sorely missing in the vanilla version of Firefox.

I have finally found the application I've needed for a long time! This application is much more user-friendly compared to its competitors. I highly recommend it to everyone

thanks dev

DOUBLE CLICK, single click won't work. (In case you missed in the description). Extension works perfectly, thanks to the dev!