How to update Mozilla Firefox for Latest Version.

Normally,  Firefox has an option to update browser automatically. But if this option is disabled and you want manually, You may need to check for updates and install them. This helps in optimizing your computer.
Navigate to Firefox Help menu and select updates option

It will show you latest version of firefox available, select and download the same.

After downloading of latest Firefox, the following Update Ready to Install will be displayed. Click on the Restart Firefox button.