Mozilla has released Firefox 20, which includes a number of significant improvements to the browser. They include the ability to initiate a private browser session without needing to open a new window or closing your current session, the ability to kill a hung plugin, a new download manager, and more.
The download manager can be accessed by clicking on the down arrow button on the right side of the search bar. When clicked, the arrow will show the drop down file manager, displaying all downloads and providing a progress bar for files that are in the process of downloading. Tools allow users to pause/resume downloads, cancel, go to the download page, and open the downloads folder.
The update also includes several bug fixes, along with the usual performance improvements, and new tools for developers. Version 20 of Firefox comes approximately six weeks after the release of Version 19.
You can download Firefox 20 for the Mac from the Mozilla website.