Windows/Max/Linux: Firefox 4 is out with its 12th and potentially final beta. What's new? Better Flash performance, 650 bug fixes, a memory leak repair and better plug-in compatibility to start. But the mouse-over action of links is what people really seem to dig.
For a few betas now, Firefox 4 was showing the full URL of the link you were hovering over in a segmented bit of the address bar. That, it seems, was not a popular choice. In Firefox 4 Beta 12, the full URLs return to the bottom status bar, and the general web reaction seems to be a collective sigh of relief.
Firefox 4 Beta 12 is a free download for Windows, Mac and Linux systems. You can read up on what's specifically new at the release notes.