Rated 5 out of 5 stars

Is there a bug while I'm watching youtube's html5 videos? It autoplayed another audio in the background. Even I pressed pause, it was still playing until the tab closed.(no problems with flash videos)

This review is for a previous version of the add-on (0.6.2.6.1-signed.1-signed). 

Thanks for the info. I had found a way to deal with this, try this: https://secure.teesoft.info/autopager/autopager_0.6.2.7.xpi
We had submit a bug as https://bugzilla.mozilla.org/show_bug.cgi?id=587536 to make the similar works easier.