For all things Firefox related - https://support.mozilla.org/en-US/products/firefox
To install or upgrade to the most current version of Mozilla Firefox:
1. Click the menu button and then click help:
2. Now click on About Firefox:
3. A new window will display. It will search and determine if you need to update:
4. If you are not up to date it will download the latest version automatically. You will then get a message that you need to relaunch the browser.