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Firefox's customized toolbar, right below the URL tabs, goes to the default settings after restart. When I restart Firefox the Ghostery, Lastpass button move all the way to the right of the toolbar past the Google Search. The WOT button, Thumbnail Zoom Button and X-notifier, go away completely and all have to be put back where I had them, every restart, after right clicking the toolbar and opening "Customize." This photo may give you a more clear idea.

Try this :- https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved?esab=a&s=toolbar++toolbar+goes+to+the+default+settings+after+restart.&r=4&as=s

This may help you . Please reply and tell us whether this helped you!

Resolved!

I wish there was an easier way then having to reset Firefox everytime something like this happens, although a minor inconvenience, it seems to of really happened a lot more since the update schedule started to keep up with Google's.

You can check for problems caused by a corrupted localstore.rdf file if it happens again.

• http://kb.mozillazine.org/Corrupt_localstore.rdf

You can also check for issues caused by an extension that isn't working properly.

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I have already reset it, but now I have made a copy of the localstore.rdf file in case it happens again.