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I'm just switched from XP to Seven. I have transferred my Firefox and Thunderbird profiles to my old XP pc to my new Seven pc. Firefox and Thunderbird work as expected, apart that with Thunderbird now when I click on a url inside a message text nothing happens, while before the browser window was loaded and the url page opened. What could be the problem source?

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  1. Go to Menubar via Tools → Options → Advanced tab → Config editor
  2. Look for network.protocol-handler.external.http
  3. Set the value to TRUE.

Found via Thunderbird does not open links if IE or Firefox is already open .

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