Sorry if this is not the correct forum to post this question but I figured it's more relevant here than in the general off-topic forum.
Lately I've been having an issue with with Mozilla's Firefox when watching videos on Youtube. The only non-standard extensions I have are Adblock Plus and DownThemAll, both of which along with the major addons such as Flash Player, Shockwave and the browser itself being kept up-to-date. Videos will play normally once but if I wish to re-play the video it simply blackscreens and stays at 0:00. Refreshing the page is fine in getting the video to re-play but I'd rather not have to do that everytime I want to listen to something again.
I imagine the most likely culprit is my Adblock Plus extension but I'm not sure what exactly I should whitelist related to youtube to re-enable the re-play function but still preventing those 30 second commercials; if anyone happens to know how to fix this I'd appreciate it whether if be explaining it in this thread or providing a more in-depth link elsewhere.