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Thread Starter 
Ever since I upgraded to Windows 8.1 I have not been able to open links from programs outside of a browser. Examples of links I can't open are ones contained in emails viewed through Thunderbird, the Tweetdeck desktop app, and the League of Legends client. I've gone into the Default Programs options and ensured my browser, Firefox, was indeed the default browser for all of its options. I'm personally clueless as what to try now.

Any assistance?