I'm more annoyed by Mozilla hiding functions used mainly by powerusers so they can be accessed only using about:config (for instance relatively recently layout.

I'm more annoyed by Mozilla hiding functions used mainly by powerusers so they can be accessed only using about:config (for instance relatively recently layout.css.text-decoration-skip-ink.enabled) and then completely scrapping the functionality, because people don't use it (duh). Now they want to do same with compact mode. I dread when they completely disable usage of userChrome.css. They completely ignore the fact that Firefox got big because technical users were installing it on computers of their less technically literate relatives. Now they changed the Firefox to be carbon copy of Chrome so powerusers no longer have any reason to use it, let alone install it for other people. My reason to keep using it is at this point only desire to avoid Chrome monoculture.