Adds a MP3 Download button next to the subscribe button, thanks to youtubeinmp3 for their simple download service (http://youtubeinmp3.com/api/). Based off magnus's youtube2mp3 code. Just used something different as it wont open another tab.
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Firefox Greasymonkey Download error 'COuld not parse script
"Could not parse script:
Ignoring @match pattern http*://youtube.com/* because:
Error: @match: Could not parse pattern."