X may now warn browser users when ad blockers affect their timeline

If X suddenly tells you that your ad blocker is stopping your For You feed from loading properly, you are not alone.

A few X users have started seeing a full-page notice saying, “Your ad blocker is preventing Personalized Timelines.” The prompt asks users to turn off the blocker and refresh the page. There is also a button to switch to the Following tab, which still appears to work.

The screenshot below was shared by @blankspeaker on X, who says the company is testing the change.

The wording is a little different from the usual anti-ad-block pop-up. X is not only saying the extension hides ads. It says the blocker prevents it from using signals to personalise the For You timeline.

In other words, X wants browser users to either allow whatever request is being blocked or stick to posts from accounts they already follow. The message does not say ads need to be unblocked to continue using X, although that is obviously part of the bigger picture.

Reports on the uBlock Origin subreddit suggest that multiple people ran into the notice, but it’s not affecting every adblock user. A few people say it appeared out of nowhere, while others have not been able to reproduce it. I’m part of the latter group, since I’ve not been able to reproduce the issue on Firefox, Chrome, and Safari, all running ad blockers.

Someone on the Reddit thread did share custom uBlock Origin rules that hide the notice or allow a particular X request. So you can try that out if you’re running into the same issue. Just copy the following and paste it into My Filters:

! Bypass X (Twitter) Adblock personalized timeline wall
x.com##div[data-testid="homeTimeline-adblockNotice"]
x.com##html:style(overflow-y: scroll !important;)
@@||x.com/i/api/*/viewer_context.json$xhr,1p

That being said, this may explain why the prompt is framed around personalisation. Privacy and tracking filter lists can block more than ad slots, and X appears to be treating one of those blocked requests as essential for its recommendation feed.

For anyone who never uses the For You tab, this probably will not be a big deal. The Following tab is right there. But people who rely on X’s algorithmic timeline may find themselves choosing between keeping their browser blocker enabled or getting the feed X wants to serve them.

This comes at a time where browser makers are now ramping up their own efforts to incorporate ad blockers. DuckDuckGo’s new built-in ad blocker and Firefox’s upcoming native ad blocker point in the same direction. Even Ladybird recently moved to Brave’s ad-blocking tech.

For now, this looks like a limited X test, not a blanket browser-wide block. We’ll keep an eye out for any further developments and will post an update if we hear anything.

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