Why should ordinary user have to tweak the program after updating?

 From mozilla.support.thunderbird:

On 14/11/2011 6:05 PM, Ron Hunter wrote:
[...]
 > I have been using Firefox for as long as it has been in existence, even
 > by its previous names, and the current versions are the most stable I
 > have seen.  There are several things that users can do to assure
 > stability.  First, make a new profile if you are having strange problems
 > no one else seems to have.
 > Second, disable all your extensions, and see if that gets rid of your
 > instability.  If it does, then add them back 1/2 at a time, and find the
 > culprit.
 > Third, don't try to keep a FF session active for a month, or even a
 > week.  This kind of software isn't designed for long-term continuous use.
 > Fourth, make sure that if you use themes, and/or personas, they are
 > designed for your version.
 > Fifth,  Disable, or uninstall plugins you don't need, and USE.  This may
 > include Java, WMV, etc., IF you don't use them.
 > Sixth, make sure that you send crash reports to Mozilla.
 > Seventh, keep your version CURRENT.
 > Eighth, make sure that when you install a new version, your firewall
 > recognizes it.
[...]
Ron, I know you mean well, and it's all excellent advice.

However, the days of leaving it up to the user are long past. The 
average naive user, who just wants to surf ans facebook and such isn't 
going to do any of this stuff. And IMO (s)he shouldn't have to. 
Releasing updates that require precautionary maintenance in order to 
work as they should is something that's OK for hobbyists, but not for 
ordinary users.

Cross-posted to mozilla.dev.usability, where I'm probably being ignored. 
;-(.

HTH
Wolf K.