I just installed it. So far, it does what it says it does, but I find that the rather large slider/button it displays over the page to be a problem. It obscures page content. It would be much better to make the Toolbar button a simple toggle. Maybe change color and/or shape when the page is locked? I have used other extensions that do this. Tabloc, for instance. Either that, or add options to make the button small or to move it.

"To dismiss the button, press the ESC button on the keyboard" — does not work in Mozilla Firefox 132.0b4 (64-bit) under Microsoft Windows 10.0.19045.5011. In addition, add-on is not FOSS, and after restarting the browser, all restrictions set by the extension are reset, and they have to be set again.

Situation: I have a long video going full screen on a 2nd monitor. I'm on main monitor surfing the web. I close that browser and sometimes the window containing the video is focused without my realizing it. I then press a hotkey or a mouse back/forward and end up totally losing my place in the video, which also has to be reloaded.

This add-on helps me avoid that situation super easily!

Thank you very much for creating this.

Disappointing it only partially worked. I wanted it for pinned tabs and that worked, but turning it off for other pages wouldn't work.