X has started warning some browser users that their ad blocker is breaking the site’s personalized feed. The full-page notice reads: “Your ad blocker is preventing Personalized Timelines.”
The prompt asks people to switch off the blocker and refresh the page. There’s also a button to jump to the Following tab instead. That tab still appears to work as normal.
A user known as @blankspeaker shared a screenshot of the notice on X and said the company is testing the change.
Not the usual anti-ad-block pop-up
Most sites simply complain that an extension hides their ads. X’s message goes further. It says the blocker stops the signals it uses to personalize the For You timeline, according to PiunikaWeb. And the notice doesn’t claim users must unblock ads to keep using X.
So the choice it offers is simple. Allow what’s being blocked, or stick with posts from accounts you already follow.
Not everyone sees the warning
Reports on the uBlock Origin subreddit suggest several people have hit the notice. But it isn’t reaching every ad-block user. Some say it appeared out of nowhere. Others can’t trigger it at all. PiunikaWeb’s Dwayne Cubbins wrote that he couldn’t reproduce it on Firefox, Chrome, or Safari, even with ad blockers running on all three.
One Reddit user also shared custom uBlock Origin filter rules. Those rules hide the notice or let through the specific request X wants, the report says.
Why frame it around personalization? Privacy and tracking filter lists can block more than ad slots, PiunikaWeb notes. X appears to treat one of those blocked requests as essential for its recommendation feed.
A limited test, for now
So far this looks like a small test, not a site-wide block, according to the report. People who never open the For You tab probably won’t notice anything. But readers who rely on X’s algorithmic feed face a trade-off: keep the blocker on, or see the feed X wants to serve.
The test also lands as browsers build ad blocking into their own products. DuckDuckGo now ships a built-in ad blocker. Firefox is working on a native one. And the Ladybird browser recently adopted Brave’s ad-blocking tech, PiunikaWeb noted.
