Comment 5 for bug 353318

I think it'd be *brilliant* for Firefox to check if the pasted text is a valid URL.

My main peeve is that it's a bit hard to middle click accurately on some mice. With a "rigid" scroll wheel, it's easy to end up scrolling up or down before middle clicking. This can move the page and so if you were trying to middle click on a link, you not only *miss* because the page scrolls (not Firefox's fault), but you get an annoying pop-up dialog box to click through (click-through dialog boxes bad!).

Just checking for illegal characters (line breaks, especially) would be awesome.