uBlock Origin Is Giving Up the Fight to Keep Ads Off Facebook

Filters stay, updates stop

uBlock Origin will no longer chase Facebook's constantly changing ad-detection code. The small volunteer team behind the ad blocker has decided to stop playing what one of its members called an exhausting game of whack-a-mole with the social network, after years of Facebook tweaking its code to slip ads past the extension's filters.

The existing Facebook ad filters are not being ripped out. What changes is their upkeep: the developers say they will no longer keep updating them every time Facebook finds a new way around them. Users who have grown used to a clean, ad-free feed should therefore expect the blocklist to fall behind rather than snap back into place.

Why Facebook was the hardest target

According to the team's own explanation, Facebook does not simply rotate its ad markup now and then. The platform hides the word "Ad" by splitting it across unrelated pieces of code and stuffing in junk text that is invisible to a person reading the page but still trips up filter logic looking for that pattern. Tactics like that turn every round of maintenance into short-lived reverse engineering.

A separate issue from Manifest V3

The decision has nothing to do with the broader shift on Chrome and Edge, where both browsers are ending support for the Manifest V2 extension framework that the full version of uBlock Origin depends on. Those browser-level changes affect how the blocker works across the whole web; the Facebook filters are a single target, and one the volunteer team has now judged not worth maintaining.