Is it just me or is firefox's update system completely broken? I am using some firefox 3.x version because the software-updater never finds a new version (and i

Is it just me or is firefox's update system completely broken? I am using some firefox 3.x version because the software-updater never finds a new version (and i do not wish to download a new executable). This is on OSX. On ubuntu, because updates are controlled via apt, i'm again forced to use ancient firefox versions. The last time i had a successful update was during the 1.5 days.