Firefox (52) remains my browser of choice – entirely because of plug-ins. When Firefox completely destroyed the UI/UX with “Australis,” a horrific UI change that basically made Firefox into a crappy clone of Chrome, the only thing that made Firefox usable was “Classic Theme Restorer.” Apparently, unsatisfied with the damage Mozilla had managed to wreak on their user-base with idiotic UI decisions, over the past year or so, a new version called “Quantum” (57) was rolled out that broke the functionality of almost every important plug-in.
This utterly disastrous and truly unforgivable transgression against the user-base was only slightly mitigated by sustaining 52-ESR, at least until the Sept of this year. After that, everyone who cares about having a decent alternative to Chrome will have to migrate to Waterfox.
In the mean time, one really important thing you have to remember to do if you stuck reinstalling your system on Linux (e.g. Linux Mint) is to immediately uninstall Firefox before using it even once. Then change your install version to ESR and install. If you let Quantum run even once, it will mark all your good plugins as disabled and you need to reinstall them one at a time to get them working again.
sudo add-apt-repository ppa:jonathonf/firefox-esr sudo apt-get update sudo apt-get install firefox-esr