Firefox 20 arrives -- adds new features and improvements

Mozilla has released Firefox 20 FINAL for Windows, Mac and Linux, and version 20 promises to be something of a landmark new release with a number of notable new features migrating across from the beta version.

The headline new feature has to be the long-awaited panel-based download manager, but Firefox 20 also debuts per-window Private Browsing, plus new developer features including an option to view Developer tools in a separate window to Firefox itself.

The new download manager is represented by a dedicated down arrow button that appears to the right of the Search bar. Clicking this or initiating a new download reveals the new panel-based manager, listing all current downloads with progress bars for those not yet complete. Right-clicking reveals additional options: pause/resume, cancel, go to download page and open downloads folder.