www.mozilla.org/en-US/mobile/36.0/releasenotes/

New

New Tablet user interface
New

Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.
New

Locale added: Maithili (mai) (Android Lollipop only)
Changed

No longer accept insecure RC4 ciphers whenever possible
Changed

Phasing out Certificates with 1024-bit RSA Keys
Changed

Add-on Compatibility
HTML5

Support for the ECMAScript 6 Symbol data type added
HTML5

unicode-range CSS descriptor implemented
HTML5

object-fit and object-position implemented.
Defines how and where the content of a replaced element is displayed
HTML5

isolation CSS property implemented.
Create a new stacking context to isolate groups of boxes to control which blend together
HTML5

CSS3 will-change property implemented.
Hints the browser of elements that will be modified. The browser will perform some performance optimization for these
HTML5

Changed JavaScript 'const' semantics to conform better to the ES6 specification.
The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.
HTML5

Improved ES6 generators for better performance
Fixed

CSS gradients work on premultiplied colors
Fixed

DNS resolution when using VPNs or switching networks
Fixed

Fix some unexpected logout from Facebook or Google after restart
Fixed

Various security fixes

Known Issues

unresolved

On Android 2.3, 3.0 and 4.0, some WebM videos cannot be read properly (1131563)
unresolved

January Chromecast firmware update broke tab mirroring (1131084)
unresolved

Style Editor: Extra white space appearing above the editor for a sourcemapped scss file (1128747)

This release does not have a Play Store Description, so we grabbed one from version 65.0.1:

Experience a fast, smart and personal Web. Firefox is the independent, people-first browser made by Mozilla, voted the Most Trusted Internet Company for Privacy. Upgrade today and join hundreds of millions who depend on Firefox for a more personal browsing experience.

FAST. SMART. YOURS.
Firefox is made with you in mind and gives you the power to take back control of your Web experience.
That’s why we design the product with smart features that take the guesswork out of browsing.

SEARCH INTELLIGENTLY & GET THERE FASTER
- Firefox anticipates your needs and intuitively provides multiple suggested and previously searched results across your favorite search engines. Every time.
- Easily access shortcuts to search providers including Wikipedia, Twitter and Amazon.

NEXT LEVEL PRIVACY
- Your privacy has been upgraded. Private Browsing with Tracking Protection blocks parts of Web pages that may track your browsing activity.

SYNC FIREFOX ACROSS YOUR DEVICES
- With a Firefox Account, access your history, bookmarks and open tabs from your desktop on your smartphone and tablet.
- Firefox also safely remembers your passwords across devices so you don’t have to.

INTUITIVE VISUAL TABS
- Intuitive visual and numbered tabs easily let you find content for future reference.
- Open as many tabs as you like without losing track of your open Web pages.

EASY ACCESS TO YOUR TOP SITES
- Spend your time reading your favorites sites instead of looking for them.

ADD-ONS FOR EVERYTHING
- Take control of your Web experience by personalizing Firefox with add-ons like ad blockers, password and download managers and more.

QUICK SHARE
- Firefox remembers your most recently used apps to help you easily share content to Facebook, Twitter, WhatsApp, Skype and more.

TAKE IT TO THE BIG SCREEN
- Send video and Web content from your smartphone or tablet to any TV equipped with supported streaming capabilities.

Learn more about Firefox for Android:
- Have questions or need help? Visit support.mozilla.org/mobile
- Read about Firefox permissions: mzl.la/Permissions
- Learn more about what’s up at Mozilla: blog.mozilla.org
- Like Firefox on Facebook: mzl.la/FXFacebook
- Follow Firefox on Twitter: mzl.la/FXTwitter

ABOUT MOZILLA
Mozilla exists to build the Internet as a public resource accessible to all because we believe open and free is better than closed and controlled. We build products like Firefox to promote choice and transparency and give people more control over their lives online. Learn more at www.mozilla.org

Privacy Policy: www.mozilla.org/legal/privacy/firefox.html