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Firefox-Class not registered error

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  • 2 haben dieses Problem
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  • Letzte Antwort von AliceWyman

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I tried changing default browser to IE and then back to firefox and nothing changed. Also I tried reinstalling firefox and it fixed error for a day but now its back. I can open firefox with Run->firefox.exe and right clicking on icon in taskbar and selectiong new tab. Also I scanned PC for viruses and nothing was found. Biggest issue firefox no longer opens when I click on links, so I had to change default browser to IE.

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Related bug (read Bugzilla etiquette before commenting in bug reports)

  • Bug 982478 - updating from fxmetro will produce "Class not registered" error prompt

Try uninstalling Firefox 30.0a2 (Aurora) - see Uninstall Firefox from your computer - but DO NOT select the option to remove your personal data and customizations since doing so will remove your bookmarks, saved passwords, and other data. (As a precaution, make a backup copy of your Firefox profile folder).

You can then reinstall Firefox by downloading it again from either www.mozilla.org for the latest release version (Firefox 28) or download the installer from http://www.mozilla.org/firefox/channel/#aurora if you want to continue testing the Aurora build.