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My Evernote clipper and 1Password buttons disappeared from my tool bar and I can't get them back.

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Home button, refresh, etc. are still there. Did everything recommended on support page and forums (restarting in safe mode, turning off extensions, checking Toolbars-Customize window) with no success. Since the toolbar button for more than one application has disappeared, I believe it's a Firefox problem. I am running a Mac Book Pro 10.6.4 and Firefox 3.6.10. Any ideas?

Home button, refresh, etc. are still there. Did everything recommended on support page and forums (restarting in safe mode, turning off extensions, checking Toolbars-Customize window) with no success. Since the toolbar button for more than one application has disappeared, I believe it's a Firefox problem. I am running a Mac Book Pro 10.6.4 and Firefox 3.6.10. Any ideas?

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You can check http://kb.mozillazine.org/Corrupt_localstore.rdf

You can also try to delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox profile folder to reset the extensions registry. New files will be created when required.

See "Corrupt extension files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

If you see disabled extensions that are not compatible on the next start in "Tools > Add-ons > Extensions" then click the "Find Updates" button to do a compatibility check.