Note: If you are already running the correct version of Mozilla Firefox, please skip these steps and proceed to Section 4: Browser Configuration.
Click Finder on the bottom left corner of your desktop.
Click on the Firefox icon. Then, hold down the mouse button.
While holding the mouse button, drag the Firefox icon over the Trash icon.
Hold the CTRL key on your keyboard. While doing so, click on the Trash icon. Then, release the CTRL key and click Empty Trash.
Click the Mozilla Firefox download link on the browsers list.
Once the download is complete, the installation process will begin. Click the Accept button.
Click the Firefox icon, but do not release the mouse button. While holding down the mouse button, drag the Firefox icon over the Applications Folder icon on the right. Then, release the mouse button.
If a security window appears, click the Open button.