There are some people who think the cause is specific extensions, I don't think so, I think it more likely having to do with the number of extensions and how many times they get updated, increasing the size of the localstore.rdf but there is no specific point at which it becomes bad I see it enlarge from 4KB on up to about 80KB usually failing somewhere between 20KB and 40KB.

This is a problem which goes back to Firefox 2 and got worse in 3 and 4, but does not affect most users (and you would think scarcely any developers).

I know I'm not about to give up any/many extensions myself:

• http://dmcritchie.mvps.org/firefox/infolister_listing_fx4.htm#extensions

current solutions:

Take a picture of your toolbars for later reference, then following directions for

• Corrupt localstore.rdf - MozillaZine Knowledge Base
  http://kb.mozillazine.org/Corrupt_localstore.rdf

It happens often enough for me that I make copies of the localstore.rdf immediately after customizing toolbars (with Firefox down, of course) so I have a copy that I can rename and restart Firefox, which is exactly what you do as well.

Although the profile database can -and often times will- become corrupt the real issue is FF4+ will always refuse to remember custom toolbar setups. Therefore the basic article posted on toolbars resetting contains truth and is useful many times it ultimately is wrong since the real problem is the browser design itself. The supposed benefit of FF4+ is speed- but that also is done by making it impossible to run more than a couple of add-ons. In effect it means that if you want anything other than an incompetent Chrome imitation and you want the ability to run enough add-ons run 3.6 until they actually release a competent **cough cough** upgrade.

@ apollow702,

I currently have 80 enabled extensions on FF 6.0, which is 40 times a couple of extensions. I do carefully choose my extensions largely based on functionality relative to reasonable size.

• http://dmcritchie.mvps.org/firefox/infolister_listing_fx4.htm#extensions

Remembering toolbar settings is what localstore.rdf is supposed to do the problem is not restricted to FF4+ this has been going on a long time. The problem most often appears when upgrading to a new version and there is a lot of toolbar and extension activity going on at those times. If somebody can come up with an solid example that makes it happen all the time the developers could work on it but it is too intermittent. Developers in general do not have many extensions, as they would interfere with their own development work. But if there is a conflict they are prepared to test interactions quickly with an a specific extension from what I've seen.