On Thursday 03 Dec 2015 18:01:22 walt wrote:
> My trouble started with my update from firefox-39 to firefox-40 back
> in  August 2015.  At first the update seemed absolutely benign and I
> noticed nothing bad happening.
> 
> Slowly but surely firefox has been driving me crazy by doing little
> things that are merely annoying.  Today firefox did something so
> outrageous that finally I had to stop and fix the problem.
> 
> The big change AFAICT was the switch from sqlite to json for storing
> data in your ~/.mozilla directory.  Today I noticed that dozens of
> files in my ~/.mozilla directory had identical date and time stamps
> from back in August, all apparently written by firefox-39.
> 
> The problem is that firefox-42 still reads *some* of those old files for
> backward compatibility, but apparently not all of them.
> 
> Anyway, one obvious thing to do is start with a fresh ~/.mozilla
> directory when you use firefox-42.  Or at least make a complete copy
> of your existing ~/.mozilla so you can start over when you have
> trouble.
> 
> I recommend that you *not* use the profile editor from firefox-42 to
> edit any old firefox profiles you may have.  You run the risk of
> damaging or deleting your old profiles by doing this.  This is *not*
> equivalent to backing up your ~/.mozilla directory.  Others have
> already learned the hard way, including moi.

Thanks for the heads up walt, I just made another back up in preparation. 
Thankfully, I'm still on stable 38.4.0.

-- 
Regards,
Mick

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