To install or upgrade to the most current version of Mozilla Firefox:
- Click "Help" on top and select "Firefox Help". This will open a new window.
- Click "Install and update".
- Click "Update Firefox to the latest version". This will take you to a new page titled "Update Firefox to the latest version".
- Follow the instructions on the "Update Firefox to the latest version" page to install the most current version of Firefox.
To install or downgrade to an old version of Mozilla Firefox, please go to the "Install an older version of Firefox" website. Please note that using old versions of Firefox poses a significant security risk.