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Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Documents that link to "Troubleshooting extensions and themes"

  • Error opening Internet shortcut or local HTML file (en-US)
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  • Navigation buttons like back, home, bookmarks and reload are missing (en-US)
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  • Customize Firefox with add-ons, plugins and extensions (en-US)
  • Fix slowness, crashing, error messages, and other problems (en-US)
  • Thunderbird Crashes (en-US)
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