via lifehacker http://lifehacker.com/395876/three-awesome-experimental-firefox-extensions
1. pic in pic (mac only so far), place video site such as youtube at the corner of your browser, multitasking
2. send image to flickr by context menu
3. ErrorZilla Plus, more way to try when you can't reach a webite
1. pic in pic (mac only so far), place video site such as youtube at the corner of your browser, multitasking
2. send image to flickr by context menu
3. ErrorZilla Plus, more way to try when you can't reach a webite