Not quite what you suggested, but achieves some of the same things https://addons.mozilla.org/en-US/firefox/addon/mafiaafire-redirector/ https://addons.mozilla.

Not quite what you suggested, but achieves some of the same things https://addons.mozilla.org/en-US/firefox/addon/mafiaafire-redirector/ https://addons.mozilla.org/en-US/firefox/addon/mafiaafire-re...