You can use this process as it will help you by using most professional way and offer you solution as your requirement.
This web browser is excessively used for business propose due to have lot of group feature because this web browser works as multi function and make you easy to work on it. Mozilla Firefox web browser has wonderful internet speed which reason this service is used in many companies.
Mozilla Firefox is already set to update in windows 8 but still you need to update it manually:
1. Click the menu button. For just basic information you can go to help option.
2. Go to Mozilla Firefox internet browser.
3. Select the Firefox option.
4. Open the about Firefox window here Firefox will start to check for the update and download automatically.
5. Now you will see the option to install the update software.
6. Now restart the Firefox to be update.
Source Url: http://clickohow.strikingly.com/blog/how-to-update-mozilla-firefox-in-windows-8