Cat Gatekeeper for Firefox: Current Status

Cat Gatekeeper Firefox and Cat Gatekeeper Mozilla status

Firefox users are now seeing Cat Gatekeeper-style listings on Mozilla Add-ons, including ports that describe themselves as versions of the Chrome browser extension. That matters because many people search for cat gatekeeper firefox, cat gatekeeper mozilla, or cat gatekeeper firefox add-on after seeing the viral cat overlay.

The safer wording is this: Chrome is still the primary official install path from the original ZOKUZOKU project, while Firefox availability depends on the specific Mozilla listing you are looking at. Do not treat every Firefox result with the Cat Gatekeeper name as the original developer’s release.

Why the status matters

Browser extensions can ask for broad page access because they need to draw an overlay on the sites you choose. That permission can be legitimate for a cat break screen, but it also means the developer identity and privacy disclosure matter.

Before installing a Cat Gatekeeper Firefox add-on, check:

• the add-on developer name
• the support site and linked project page
• the permissions requested
• the review count and review text
• whether the listing links back to the original project, GitHub repository, or creator

What to use now

If you want the most direct path, use the official Chrome Web Store listing. If Firefox is your main browser, open the Mozilla listing carefully and verify it before installing.

For primary project signals, check the official project page, the GitHub repository, and the creator’s X account. For Firefox-specific installs, use Mozilla Add-ons rather than random mirrors or download pages.