Firefox 12 was released on April 24, 2012. Firefox 12 introduced few new features, but it made many changes and laid the ground work for future releases. Firefox 12 for Windows added the Mozilla Maintenance Service which can update Firefox to a newer version without a UAC prompt.[42] It also added line numbers in the "Page Source" and centered find in page results. There were 89 improvements to Web Console, Scratchpad, Style Editor, Page Inspector, Style Inspector, HTML view and Page Inspector 3D view (Tilt).[43] Many bugs were fixed, as well as many other minor under-the-hood changes.[44][45] Firefox 12 is the final release to support Windows 2000 and Windows XP RTM & SP1.[46][47]