Howto enable silverlight in ubuntu firefox

You can install moonlight from site but still - there will be no effects. You don't have apropirate codecs. In the next step you need to open page with samples. Then clik on one of given samples and allow to install codec. Thats all.

Howto remove a broken add-on from Thunderbird

When you add a broken add-on to Thunderbird it may cause Thunderbird to prevent you from doing anything, so you cannot remove add-on which is causes Thunderbird crash. Write in terminal:

thunderbird -safe-mode

Then you can remove and add-on.
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