If it's so easy to keep it updated, then it by definition must be easy to support older versions. I.e., either the changes are big or they aren't. Supporting

If it's so easy to keep it updated, then it by definition must be easy to support older versions. I.e., either the changes are big or they aren't. Supporting your existing userbase is never about how easy you think it is to upgrade. Maybe all the big guys are doing it wrong, but with every new Firefox release since 3.6.x I've had problems getting Firebug and 1Password working. And I have a hard time faulting them for not being able to keep up. And I've just had to give up on using the ElasticFox add-on at all.