Capture Fox Movie is a Firefox add-on and a handy tool to create tutorials about a software, a web site or anything that can be displayed on your computer. It records your screen frame by frame. You can also record your voice.
KGen (Keyword Generator) is an extension that allows you to see what keywords are strong on visited web page. Than, you can retrieve them for social sharing (tag filling) or webmastering/SEO. KGen retrieves every words of a page and lets you know how many