I got updated to Firefox 57, a major redesign, only to find that it no longer supports most of the must-have extensions that I relied on FFox for. Such as TabMix Plus (espec Session Manager), Go Parent Folder (for bookmarks), Copy URL's, and others. A major hassle, and there arent any good replacements. I've seen stuff on Firefox ESR, but it sounds risky to switch to that. Can ESR & Quantum coexist? It seems that FFox 57 is slightly diff than FFox Quantum. Maybe some other older version? I would need to create a new FFox profile, which sounds tricky. Any help/advice is greatly appreciated.
Later: I tried various combo's of installs/uninstalls and diff profiles, and I've only succeeded in making things worse. Am limping along with the latestversion, tho It seems that FFox 57 is slightly diff than FFox Quantum. I think I have Quantum active right now. Any help/advice now even more greatly appreciated!
PS: how can I reply to everyone who posted on this topic?