Popular ad blocking extensions such as AdBlock and AdBlock Plus offer settings for temporarily disabling ad filtering if you want to see ads on a particular website. If you'd rather get rid of the ad blocker entirely, for example, if it interferes with many sites you use or you want to switch to an alternate extension, uninstall it through the Extensions tab in Firefox's or Chrome's settings. The Internet Explorer version of AdBlock Plus, on the other hand, uninstalls through the Programs and Features Control Panel.
Open the menu in the upper right corner of Firefox and choose "Add-ons."
Switch to the "Extensions" tab. This tab contains user-made browser add-ons, including ad blockers.
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Click "Remove" by the ad blocker you want to uninstall. The most popular extension is AdBlock Plus, but if you use another, press "Remove" by its name instead. You might need to quit and reopen Firefox before your ad blocker turns off entirely.
Open Chrome's menu and click "Settings."
Press "Extensions" on the left-hand menu on the Settings page to see all your browser extensions.
Click the garbage can icon next to your ad blocker. The two most popular Chrome ad blocking extensions are AdBlock and AdBlock Plus, but the removal method is the same regardless of which you use. Press "Remove" to confirm the choice and restart your browser.
Close all Internet Explorer windows, and then search for and open "Add or Remove Programs" on the Windows 8.1 Start screen or the Windows 7 Start menu. Unlike with Firefox and Chrome, you can't remove AdBlock Plus from within Internet Explorer 10 or 11 -- you need to use the Windows Control Panel.
Select "AdBlock Plus for IE" and click "Uninstall." To find the program easily, search for it with the search bar at the top right corner of the window.
Press "Yes" to finish the removal.