Is Codeforces Customizer safe?

Clean risk

Customizes Codeforces pages with improved blog browsing and quicker problem submission views.

This extension changes parts of Codeforces to make favorite and user blog pages easier to browse, including hidden blog entries, a title search bar, and expand or hide controls. It also adds a way to open the all-submissions status page from a problem page and can apply a saved Codeforces list key by default on problemset or contest pages.

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 Codeforces Customizer 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.

  • codeforces.com

    Codeforces Customizer sends data to codeforces.com. 5 other extensions we have analysed send data here.

Updated 15 October 2026akmlgflgekmnameijijkefhochekjfgg