FollowLink：Reimplements vimperator's link following...
This is a simplified subset of Topovica which is a subset of Vimperator. The idea is to use default Firefox shortcuts whenever they are available and use the Vimperator style when nothing appropriate is provided by Firefox. It is a pity that easy link following is not in Firefox by default.
- `.` → brings up the buffer selector interface. Typing will search buffers for matching indexes or titles, displaying them as hints. `Tab` or `Shift+Tab` cycles between hints. Pressing `Enter` jumps to the first match if no hint is selected, else to the selected hint
- `;`, `:` → displays indexes for links: typing in those indexes follows the link in the current tab or a new tab, respectively.
- `,` → copies the current url to the clipboard