Extensions and add-ons all of a sudden does not work
The add-ons I have been utilizing is no longer available and all of a sudden is not working and is disabled no matter if I tried it again. Have no idea why all this is happening. I had Similar Sites toolbar, Skype, Adblock Plus, Cooliris, etc.
This happened
Every time Firefox opened
== All of a sudden and no longer is active
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Hello Axel.
If you provide more detail about your problem, that would be perfect. Also, please go into Help > Troubleshooting Information... (alternatively, access about:support in your location bar) and click "Copy all to clipboard". Then paste here. Hopefully that will give me a bit more information to work with.
In any case, hopefully this support article is what you need:
https://support.mozilla.com/en-US/kb/Unexpected+installation+error+-203+when+installing+add-ons
Your plugins list shows outdated plugin(s) with known security and stability risks.
- Shockwave Flash 10.0 r32
Update the Flash plugin to the latest version. See http://www.adobe.com/software/flash/about/