Rated 5 out of 5 stars
*Edited* Yes, it works now, though I think it should change in a more explicit wayanyway, as I said, the support here seems better than Foobar. quick helpful answer. i think i'll try it again, since del URL items don't work properlyTry it, can't find option to search in new tab (background or forward).....This review is for a previous version of the add-on (0.7.2.20100912).
It i s an about:config property `browser.search.openintab`. You can change it to start opening searches in a new tab. Moreover, you can use Alt+Enter to open search result in a new tab without changing the config option.