Looks like the #Firefox extensions situation is finally back to acceptable after all the XPCOM ones got dropped years ago. I kind of grew to like #PaleMoon and #Waterfox Classic in the meantime, but I can't say I'll miss constantly fiddling with the configuration just to unbreak another website.
One thing I'm missing is the ability to control individual frames. Does anyone have a #recommendation for an extension that restores the frame commands (reload, show only this, open in new tab) to a modern version of #Firefox?