The behaviour and response of Firefox is influence by the platform it is used on. PC users will get high speed browsing as a default, but tidying up the FF memory can make it zip along better too, as will installing the minimum necessary add-ons -- some, like Ghostery, slow Firefox down considerably, mores if it is used with an ad blocker.
FF has long been buggy, blighted and quite unstable on Android tablets (tablets, specifically), and for that reason I use Chrome, but Firefox is unremarkable and speedy with a Samsung S9 phone.
Sync settings are similar whether the browser if Chrome of Firefox; additionally, Firefox will update/re-order/delete bookmarks that have changed on one machine in the sync line-up and reflect this in others. I have not seen this in Chrome.
I don't know exactly but I think Mozilla offers an add-on or plug-in for colour management (?) instead of through the config line.