After the update of 16.0.1 I can't install addons more. they are downloaded, but then an installation progress bar appears and nothing happens.

I'm on arch linux i386, upgrading from firefox to 15 to 16.0.1 erased all my extensions. I tried to install their new, also tried with the firefox 17beta, nothing works.
If I could find the binary for v15 check if it's the same thing here I would try it.

My profile is always loaded, bookmarks and history here, but all the addons disappeared.

Help in German IRC.
Resolved by HELP > troubleshooting information > reset firefox

Tags: Firefox

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