In the unlikely event that anyone who actually writes Firefox code reads this, here is what you need to do:
1. When starting, and there're some malformed files (blame extensions) in the home directory DON'T JUST SIT THERE AT 5% CPU AND 2K RAM USAGE FOR 20 MINUTES. Give me a notification saying that my cookies file / bookmarks / settings file / whatever is borked and ask me what I want to do about it.
2. While we're talking about the home directory, improve the way Firefox works when the home directory is on a remote drive (e.g. thin client). Usually there is *some* local storage that can be used on a per-session basis - for caching, working directories, etc. The only stuff I want in my home directory is what I want to persist across browser sessions.
3. Go back to traditional version numbering, you really didn't need to ditch it.