Is Add custom search engine safe?

Clean risk

Adds user-defined search engines to Firefox’s search and address bars.

You can create a custom search engine by entering a name and search URL, with optional fields such as an icon, suggestion URL, POST parameters, input encoding, and description. The extension’s interface is available from a toolbar button or its add-ons options, and the store description states that data entered during creation is uploaded to a third-party service.

Tom SchusterFirefox Add-ons
0Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Where it sends data

Destinations our analysis observed Add custom search engine contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • dpaste.org

    Add custom search engine sends data to dpaste.org. No other extension we have analysed sends data here.

  • paste.mozilla.org

    Add custom search engine sends data to paste.mozilla.org. No other extension we have analysed sends data here.

Updated 15 October 2026amo-989796