Perfect, if it weren't for a niggle... Rated 4 out of 5 stars

Great addon, does exactly what it's supposed to do. There are a few sites that do need to be whitelisted in order to function properly, but after doing that they work flawlessly.I do have one complaint, and that is the fact that Flashblock has a rather severe memory leak, using a very significant amount of system memory. When upgrading from FF3.6.x to FF4, there were quite a few addons that weren't optimized for FF4 and also had memory leaks of their own. I hoped this was not the case with Flashblock, but it seems a fix is in order. Until then, I think I'll have to enable this addon on a need to use basis.Please fix the memory leak please.

This review is for a previous version of the add-on (