Opera 20 is a web browser developed by Opera Software ASA, available for download in full install version for Windows platforms from legacy sources. This version of Opera was officially released on 2014-03-04 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Opera 20 has been built on Chromium 33 rendering engine using JavaScript engine V8. This version is supported in Windows XP and later versions except Windows 10.

Opera now has introduced quick way to add your bookmarks and Speed Dial entries by simply dragging the tabs to the bookmarks bar. Now you can customize your speed dial entries with thumbnails in custom sizes. 

In the Mac edition, if you exit the browser by shortcut keys, Opera will display a exit notification, which avoids accidental closure of the browser. Among the stability improvements, Stash screen shots have been optimized. As usual the developers extended full support for the Chromium release version 33.