After installing Popular ad blocking extension, Adblock Plus in Firefox (now works with Australis) when you open and see its preferences window, you can notice Adblock Warning Removal List automatically added to Filter Subscriptions tab but not enabled or selected. Why was this filter added by ABP without user consent and what is its purpose? Some sites on detect of adblockers on user’s browser automatically display some messages to stop using Adblocker (please don’t block our ads:) ).
Adblock Warning Removal List
Warning Removal list filter subscription when enabled, blocks these sorts of anti-adblock warnings and obtrusive messages on websites.
Update: When ABP was installed, Warning Removal list appears in Chrome and Opera browsers also.
Update 1: Enable this to disable custom ads or warnings shown by sites to ABP users.