Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Stranger Things Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with search permission is a textbook search-monetization shell pattern.
• Privacy policy is Google's generic account policy — not scoped to this extension, admits data collection and 3rd-party sharing.
• Uninstall and install URL hijacks redirect to developer's tracking endpoints.
• No developer display name; no CSP on MV3 extension with innerHTML DOM-XSS sink.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to index.html — full new-tab page takeover.
• uninstall_url_hijack crx setUninstallURL targets gameograf.com with UTM tracking params.
• install_url_hijack crx onInstalled opens gameograf.com with UTM tracking params.
• generic_privacy_policy store Policy URL is Google account policy; scope_extension=false, data_collection=true, third_party_sharing=true.
• external_host_uncontrolled crx mlionltd.github.io is a third-party GitHub Pages host outside developer control.
• no_csp manifest content_security_policy is null; no CSP declared despite DOM-XSS sink in popup.js.
• dom_xss_sink crx innerHTML assigned from variable in js/popup.js with no CSP guard.
• no_developer_name store developer_name is empty string; accountability reduced.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Stranger Things Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.91 -> 7.41 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows manipulation of the browser search provider; paired with newtab override amplifies monetization risk.
• host_permission: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.
• chrome_url_overrides.newtab high Replaces new-tab page; primary monetization/search-hijack vector for this extension type.

Pillar Scores

Bookkeeping