Yes! Tabs open to YouTube when Firefox was closed then reset (for any reason, including an MS Windows bugcheck) will start playing when Firefox is reopened. This is annoying, especially because locating the offending tab is difficult when my session ...
Hamburger > Settings > Privacy & Security > Manage Data [button] > (select web sites) > Remove Selected [button]The "Removing Cookies and Site Data" should allow the user to unselect web sites on the list. At present a user who has selected a large n...