Rated 5 out of 5 stars

Here's a 100% working DIY fix for FF 3.6:

In rsetoolsOverlay.js replace method browse with:

var browse = function(url) {
gBrowser.selectedTab = gBrowser.addTab(url);
}


if you don't want new tab to take focus, then use this
gBrowser.addTab(url);

This review is for a previous version of the add-on (0.29).