If your going to use the above template to make a link extension for your vb forum, I altered one of the js functions a bit. In chrome>content>common.js add this function. Make sure you change it to your site url and forum root.
Code:
function tsg_open_vb(event, fid)
{
if (event && event.button != 0)
{
getBrowser().addTab("http://yoursite.com/forumhome/forumdisplay.php?f="+fid);
} else {
loadURI("http://yoursite.com/forumhome/forumdisplay.php?f="+fid);
}
}
Then you can just tsg_open_vb(event, '5') using the forum id instead of puting the whole url for every link. Smaller is better with js.
FYI. That install.js file that comes with that above code is legacy and not needed for Firefox. Firefox handles the install now. It may be needed if you wish to install in another mozila based app, or it may not. Not needed for FF though.