How to Delete Adblock
"Adblock" or "Adblock Plus" is a plugin program designed to operate with the Mozilla Firefox Web browser, and functions by blocking a variety of unwanted advertisements and pop-ups from appearing on your screen. It also helps block spyware and malware from entering your computer. Occasionally, however, Adblock gets a little overzealous in its protection and may prevent you from viewing a legitimate Web page. Whether for this reason or for another, it is a relatively simple matter to uninstall Adblock from Firefox.
Launch Mozilla Firefox.
Click the "Tools" menu and select the "Add-ons" menu option. This will bring up a new dialog box on your screen.
Select the "Adblock Plus" add-on entry.
Click the "Uninstall" button to remove Adblock from your browser. You will need to restart Firefox once the add-on has finished uninstalling.