firefox turns off video downloadHelper, its grayed out so I can't select it
I cannot select video download helper. When firefox first opens you can see that download helper is colored in and then it goes gray. I have it enabled in addons but ff will not let it open.
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It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
New files will be created when required. You can use this button to go to the currently used Firefox profile folder:
- Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
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 or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search bar to check if there is a compatibility update available.
If this hasn't helped then also delete possible addons.json and addons.sqlite files.
Please update to the current Firefox 31 release.
- Help > About Firefox
- https://support.mozilla.org/kb/update-firefox-latest-version.
- https://support.mozilla.org/kb/Updating+Firefox
The Firefox version that you currently run is no longer supported with security updates.
- It is important to update Firefox and add-ons to the latest version to get all security fixes.