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Couldn't save preferrences, now FF won't start at all?

  • 5 replies
  • 1 has this problem
  • Last reply by FredMcD

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About a week ago, FF updated to 33.1.1. Since then it started with being always welcomed to the new version of FF. I then could not change my preferences. I have done complete uninstalls (using Revo) and fresh installs with no success - FF continues to open with all my bookmarks, etc intact. I have backed up all my settings, etc using FEBE.

Then this morning, FF will not open at all. I have tried to open the Profile Manager using the full path but it will not open either.

I have run out of ideas, and can find nothing extra on the net. I love FF, but may have to move to Chrome (or ...) if this can't be fixed.

As FF isn't running, I can't seem to run the Troubleshooting utility to give you more info ... :(


All Replies (5)

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I have managed to get FF running again. I found out that my profile is stored in a location that is not cleared when FF is deep uninstalled. I renamed that folder and then reinstalled FF. I was able to restore bookmarks as I had imported them into Chrome.

However, I STILL can't change some preferences - the wake up page settings specifically - I change them, close and restart and FF still thinks I have a new install/update and opens to the welcome page and the What's new page ... :(

The prefs.js file is not locked so that's not the problem.

Any other ideas?


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It appears that I don't have administrator rights on my own computer! And I can't modify prefs.js because of that. Mine is the only account on the computer and I am listed as having Administrator priviledges.

I have tried running FF as Administrator from the Start menu, but I still cannot change prefs.js ...

Suggestions please?

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Thanks Fred, but I've tried ALL that already.

I THINK I might have found the problem - the Profiles folder has been locked by inherited properties from the levels above. I have had to go all the way up to my User folder and reset ALL the properties from there down to be unlocked so that I could remove the prefs.js file so that it could be recreated on the next launch of FF. Exactly why my User folder is locked in such a way as to stop me/FF making changes when I have been able to alter preferences at will in the past, I don't know ...

So far, so good. I have since done a complete shutdown and when I restarted this morning, FF seems to be behaving itself ...


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It might be that one of your protection programs did that. Check all of them. As you know, many programs create temp or perm files / folders. If they become locked, those programs may not work properly.