Pasting issue with FF 20 Rated 5 out of 5 stars

First of all thank you for this great extension, I've been using it for years now. Since the Firefox 20 update I've been having issues with pasting. It seems that the Fastestfox Auto copy selected is causing the problem. When disabled pasting is fine. Have tried previous versions of Fastestfox but the same issue remains. Do hope this can be fixed.

This review is for a previous version of the add-on (5.1.3).  This user has other reviews of this add-on.