Comment 26 for bug 353318

middlemouse.contentLoadURL is great but it should be disabled by default. Pasting on content area is anything but "open new URL here", and middle-clicking on the tab is the "close tab" action.

And all that on-the-fly URL parsing should be disabled too: it's useless (due to many different forms of valid URL including just selected [a-z]+) and brings uncertainty to all actions. If if thinks this time URL is valid it acts one way, if it does not -- it acts another way for same user action.

Mozilla is not M$ to take away the freedom of choice ;)