I loved to use the Firefox-Plugin “Mouse Gestures Redox” under Firefox. It enables you to navigate with some little mouse-movements and saves a lot of time. Unfortunatly, the Plugin is not maintained any longer, and does not work under actual versions of Firefox.
So I had to decide either to use an old Firefox, or not having the Mouse Gestures any longer. Now I found a much better PlugIn, that does the same and is operational under the actual Firefox versions:
Hint: To open multiple Links in Tabs, or to save multiple files at once press the CTRL-key and perform your Gesture.
If you go to the Mouse Gestures Redox site: http://www.mousegestures.org/dev/nightly/ they still have nightly builds, the last was updated 9/22/11 and supports up to FF 7.* I haven’t had much time to use it but it appears to be working fine.