Officially released by Mozilla officially two days ago, on April 2, the 20th release of the popular Firefox web browser brings per-window private browsing, a brand-new download experience, fixes Unity issues related to HiDPI mode, a new JavaScript Profiler utility, blend mode support in , several <video> and <audio> improvements, and much more. The good news is that Mozilla Firefox 20 is now available for all supported Ubuntu platforms, including Ubuntu 12.10 (Quantal Quetzal), Ubuntu 12.04 LTS (Precise Pangolin), Ubuntu 11.10 (Oneiric Ocelot) and Ubuntu 10.04 LTS (Lucid Lynx).