Firefox How to Install AdBlock Plus Extension
To install the AdBlock Plus extension in Firefox, open your Firefox browser.
Navigate to the Firefox Add-ons website by typing "addons.mozilla.org" in the address bar. In the search bar on the Add-ons page, type "AdBlock Plus" and press Enter. Click on the AdBlock Plus listing from the search results. On the AdBlock Plus page, click the "Add to Firefox" button.
A confirmation pop-up will appear; click "Add" to confirm. Once the installation is complete, another pop-up will confirm the successful installation.
AdBlock Plus is now installed and active in your Firefox browser. You can manage or disable it by going to the Add-ons Manager in the Firefox menu.