Rated 1 out of 5 stars

This "quantum" version of FF is the epitome of why I left the other browsers in the first place! Mozilla hit its fanbase with a cheap shot. No forewarning us that we were going to LOSE functionality, add-ons, etc.
The "add-ons" available that actually work with this crap version of a Firefox browser are few, and mostly useless. Themes? Really?
GONE are the numerous add-ons that were they primary reason many of us left IE, Chrome, etc. and migrated to Firefox as our primary browser. Firefox just turned itself into the very thing most of us were trying to get away from when we switched to FF in the first place!!!
Bad move Mozilla... bad move :(