In the last-post, I went through the most popular Firefox extensions and talked about whether they were good ideas or not. However, it seems that not a lot of people think about another side to this, i.e. what are your Firefox extensions licenced under?

One of the primary strengths of Firefox is its extensions. Sure if they aren't programmed well they can end up draining memory from your system and such, but they can still be rather useful. Here are a few extensions that I consider to help my productivity greatly.