I am using Firefox 94 on Debian Linux (details below). I've been a happy FF user for many years but, ever since I updated to Firefox 93, I've been facing an odd problem. When I start FF (usually using my system launcher or the command line), the first window that opens will not allow me to open a new tab. Press the '+' button does nothing; trying to open links in a new tab does nothing; etc. Not only this, but it seems like there are other problems (e.g. my adblocker does not seem to be working in YouTube), but I can't confirm this. When I open a new window from the menu, all functions work normally in the new window. But the original window continues to have these problems. This isn't a major inconvenience, but it just seems like an odd bug. One factor that might have something to do with this - I run FF inside [https://firejail.wordpress.com/ Firejail]. I start FF via a one line script: `firejail /opt/firefox/firefox` Maybe this has something to do with it? Thanks so much to Mozilla for this wonderful piece of software, and to all of you for helping out with it!