Mozilla Firefox web browser has reached version 45. Ubuntu 15.10, Ubuntu 14.04, Ubuntu 12.04, and their derivatives can now upgrade it via Software Updater.

Firefox 45 comes with following changes:

• Instant browser tab sharing through Hello
• Tabs synced via Firefox Accounts from other devices are now shown in dropdown area of Awesome Bar when searching
• Synced Tabs button in button bar
• a new preference (network.dns.blockDotOnion) to allow blocking .onion at the DNS level
• Tab Groups (Panorama) feature removed
• HTML5 improvements with ES6 classes, a Web Speech synthesis API, and Push API support
• For more, see the release notes

Upgrade to Firefox 45 in Ubuntu:

Ubuntu Team has made the new release into updates/security repositories for all current Ubuntu releases.

So just launch Software Updater, and you’ll see Firefox 45 available in update list after checking for updates:

If you don’t see it, please launch Software & Updates and do:

• switch to “Main Sever” after “Download from” drop-box in first tab.
• make sure the “important security updates” and “recommended updates” are enabled in Updates tab

Finally, relaunch Software Updater to upgrade Firefox web browser.