I use the Greasemonkey extension to do something similar to this - while I don't have _blank targets opening in new tabs, I use one script ( http://userscripts.org/scripts/show/1691 ) which causes it to open in the /same/ tab. This to me is a actually a better solution to the problem - YMMV. -- Lennon Victor Cook
What about Javascript? Would a code like window.open('url'); open in the same tab or in A new window??