Cat Gatekeeper Chrome Extension: What to Install
A practical guide to the official Cat Gatekeeper Chrome extension, custom target sites, browser permissions, and what to check before installing.
The short answer
Chrome users should install the live Cat Gatekeeper Chrome extension from the Chrome Web Store. That is the main public release today.
Cat Gatekeeper is built for the moment when a feed stops feeling like a choice. After your chosen limit is reached, the extension puts a large cat overlay in front of the active tab and starts a break countdown. The page is still there, but the next scroll is no longer automatic.
The current Chrome listing also notes a useful update: you can add custom target sites. That makes the extension broader than a fixed list of social networks, though it still works best on sites where you stay on the same service for a while.
What happens after install
Open the extension menu, choose the social sites that usually pull you in, and set a limit you will actually notice. Cat Gatekeeper is useful on sites like YouTube, X, Reddit, TikTok, Instagram, Threads, Facebook, and Bluesky because those pages make it easy to keep going without a natural stop.
If your personal time sink is not in the default list, try adding it as a custom target site from the extension menu. Start with sites that keep the same service open rather than pages that constantly reload or jump between unrelated domains.
The timer is about active browsing, not a forgotten background tab. That makes the extension feel less like a punishment system and more like a visible break point for the tab you are actually using.
What to check before installing
Use the Chrome Web Store listing rather than random mirrors. Check the extension name, the developer identity, the Cat Gatekeeper icon, and the permission explanation before you install.
The permission request exists so the cat overlay can appear on the sites you choose. If your main problem is social browsing inside Chrome, Cat Gatekeeper is the cleanest official path.
If you are comparing Chrome with Firefox, remember that Firefox add-ons may be ports or lookalike projects. Check the developer and support links before treating any Firefox listing as the original Cat Gatekeeper release.