Better to just never, ever change, right?
Well, if your user base is happy with how things are... why should you change? To piss off them off when they are used to the old interface, to interrupt their workflow? Wouldn't they appreciate the time (and money in this case) be instead spent on things they do want -- like a faster browser, or less memory usage, since those are the two thing people are always crowing about.
Change for change's sake is the sort of thing Microsoft does -- when they're desperate to try and get people to pay attention to them.
The Australius UI and version number jump just shows how lost Mozilla is. They're chasing Chrome users and forgetting they have a userbase that is with them specifically because they aren't Chrome.
Whereby "real users" are... who exactly? What obscure bug have you hit, and how does my not hitting it make me not a "real user."
My current beef is actually with Thunderbird. But it's funny that comes up, since Thunderbird is not quite good enough for Mozilla anymore.
I use Unified Folders view, and since Thunderbird 31 I have three issues
1) Sorting order on unified folders is no longer remembered -- it changes to Date:Ascending on every launch.
2) Column views are no longer maintained -- I had the "Location" column hidden and the "Account" column displayed (obviously a more useful substitution when in this view), and on restart they change back to the other, original, column choices.
3) Unread messages are being double-counted on the Inbox (two new emails are listed as four unread on the folder indicator) -- I don't know if that has even been since 31, I feel like it just started more recently.
These issues are on two different installs of Thunderbird on two different platforms (Win 8 and OSX), and the OSX build isn't even regular Thunderbird -- but the TenFourFox third-party build.
These aren't large bugs. I even found an extension to work around #1.
I don't have much faith in them getting fixed, though.
But if we go though Firefox's bug tracker, how many of those bugs have been open for years and years without any activity? If Mozilla has time and money to waste, they can start by auditing their bug list and just start knocking them out, oldest first (if they're still a problem).