The latest update of Mozilla's Firefox browser, version 41, has been released for Windows, Mac, Linux and Android with some handy new upgrades including an integrated messenger feature based around Firefox Hello, the browser's integrated VoIP client.

"Firefox Hello Beta, developed with our partner Telefónica, is the global communications system built directly into a browser and it will now let you send and receive instant messages when you're in a video call in Firefox for Windows, Mac and Linux," explains Mozilla.

To access the new feature, make sure you're using the latest version of Firefox (if it hasn't updated automatically, open the menu in the upper right corner of the browser, click the '?' symbol at the bottom of the drop down menu and then select 'about Firefox') and click the smiley face icon in the menu bar. This will open up a small window where you can have an audio or video chat with someone and exchange instant messages. The feature only works on the desktop version for now.

Additionally, version 41 brings updates to the Firefox accounts feature, which allows users to synchronize their passwords, bookmarks, history and open tabs across multiple desktop and mobile devices. The update also gives users the ability to personalize their Firefox account profiles by adding a photo so contacts can see who they're communicating with.

For the Android version of Firefox the upgrade brings the ability to perform searches from multiple sources like Google and Bing, improved bookmark detection to avoid duplicates, and swipe-to-close on tablets.

For a list of everything that's new, improved and fixed in Firefox 41, check out the release notes.