An user script of general application is one which changes the background colour of some sites. Also, for facebook only, FBPurity. https://greasyfork.org/en/scripts/979-nobrighter https://www.fbpurity.com/
I use bookmarklets also to change background colour. Two are based on a script posted on reddit, two others from https://www.squarefree.com/bookmarklets/.
I'm not seeing any such posts on fedia.
Evidently, adding a tag to a bookmark enables that section. In my case it's already there.
Where do you see that strict ETP sets your time zone to UTC? Setting resistFingerprinting to true does that.
Look at this post by MrOtherGuy : https://lemmy.world/post/687686. For a menu item added by an extension, you should use its label, e.g. menuitem[label="Copy Tab Title and URL"]. Are you aware that there is a FirefoxCSS on this site? https://fedia.io/m/FirefoxCSS/
It is still there on my Linux OS but hasn't worked for some years. I have had to use KDE to hide the title bar; perhaps you can do something similar. Check about:policies in case your distro is disabling the option.
I'm still getting the hang of this site. I thought I replied to your comment but my reply showed separately. I get the same result as the OP.
OK. It happens here as well.
I'm not willing to try it. Does your OS perhaps contain such a combination?
I also use auto tab discard. This is the only tab to which it prepends a z.
I think you will have to use a method other than Mozilla to sign in to connect. I can use google and one other which I forget. Once you are signed in, you may be able to change your connected email account.