Rated 5 out of 5 stars

Home Double Click Extension 1.2.0 -- Works with Firefox 3.6.3 by modifying em:maxVersion to equal 3.6.* in the extension's install.rdf -- Personally I've chosen 'Homepage 2' to be chrome://browser/content/places/places.xul which enables Library to open in (new) tab whenever Homepage button in doubleclicked. Et voila!

This review is for a previous version of the add-on (1.2.0).