As shared on the Mozilla blog, prominent features of Firefox 20 include:
- Support for starting private browsing in a new tab of an already existing web-browser session. Firefox for Android also now supports private browsing on a per-tab basis.
- A new download manager has been introduced in Firefox 20 that is located within the Firefox toolbar rather than a separate window.
- Firefox for Android now supports slower ARMv7 processors.
- Various developer improvements.
For a video preview of some of the new features, courtesy of Mozilla: