As I understand it, add-ons are updated more slowly than their Chrome counterparts because Mozilla actually reviews the code of each add-on offered from their store to attempt to validate it's not doing anything naughty. Google and Apple make these types of promises, but really they approve things after a cursory glance and then respond to any user complaints that may come in.
Which is really what Firefox needs to do as well. This is one of my main pain points as a Firefox Extension developer and a turn off for most I know. Rather than keeping people wait for 15 or so days for approving their add-ons, they should rather improve their automatic code checking tools as much as they can, and stop at that (and have a better extension flagging system).
The problem with current system is more if our add-ons are based on a specific website like mine. When that website changes, it breaks my add-on and I upload the fix immediately. But Firefox takes days to approve it, making my add-on look bad in public.
Yeah, this is the tradeoff. It takes a long time to audit code. Supposedly Mozilla is doing this every time an add-on update is sent for review. Google and Apple just pretend like they do, and I guess Mozilla didn't get the memo that you're supposed to pretend.
