Ad blocker stopped working after an iOS update?

iOS updates sometimes switch Safari extensions off. Nothing is broken — turning your ad blocker back on takes one switch.

Turn it back on

Open Settings → Apps → Safari → Extensions. On iOS 17: Settings → Safari → Extensions.
Tap the blocker — for Popbye, Popbye — Ad Blocker.
Turn on Allow Extension. Using Popbye's Tracker Blocker too? Check Popbye — Tracker Blocker the same way.

Open the blocker's app once: Popbye checks its status and rebuilds its rules when you open it.
Popbye blocks with Popbye Pro — check that your subscription is active in the app.
Close Safari in the app switcher and open it again.
Open the Popbye test page in Safari to see what is removed.

Popbye checks itself when you open it and in the background. If you allow notifications, it tells you when it has been switched off.

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