Mouse Gestures - Firefox extension
I use Firefox's Mouse Gestures extension so I rarely have to use the keyboard when browsing the forum.
You navigate using your mouse to 'draw' the action you want. For example, I right-click drag up through a link to open it in a new tab, then drag down anywhere on the window to close the tab (my custom setting - I think the default is to drag right-left-right as though you were rubbing it out).
You can quickly increase the text size by 'slashing' from top-left to bottom-right (the reverse shrinks the text again). Great when I don't have my specs with me.