Add-ons Hidden in Update to Firefox 12.0 beta

After looking through the forums, this seems to be identical to the issue relating to a Firefox 7 update. However, all the tools to bring back the add-ons have been taken down as the problem was fixed in 7.0.1.
Is there a way to solve this problem in Firefox 12? All my add-ons appear to be functioning correctly (NoScript, TMP, etc.) and I can even access the prefs for those that put a link to them in the Tools menu or I have placed on the address bar via a button. But they do not appear in the about:add-ons window which reports that "You have any add-ons of this type installed."

It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.org/kb/Unable+to+install+add-ons
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is a compatibility update available.

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