This might sound like a crazy idea, but they could always try listening to users! Everytime I get annoyed by something in Firefox and try to find a fix for it, I find a lot of people with the same issue across HN, Reddit, the Mozilla forums, etc. There is rarely any sign that a decision maker from Mozilla cares one bit. But rather than listening to the many vocal complaints, suggestions, and other copious public feedback... they add a unique download identifier. Ok then.
I really, really hope that Mozilla gets new management before it's too late (if it's not already).