Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Tokyo Revengers Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic account policy — not scoped to this extension, admits data collection and 3rd-party sharing.
• New-tab override with uninstall URL hijack and install URL hijack — classic traffic-monetization shell pattern.
• No developer name listed; verified-publisher discount is limited due to new-tab override (HIGH-capability gate).
• innerHTML sink in popup.js without CSP creates DOM-XSS exposure.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to index.html — replaces every new-tab with branded page.
• uninstall_url_hijack crx setUninstallURL → gameograf.com with UTM params; monetization shell pattern.
• install_url_hijack crx onInstalled opens gameograf.com with UTM params.
• privacy_policy_generic store Policy URL is myaccount.google.com/privacypolicy — Google's own policy, not extension-scoped.
• dom_xss_sink crx popup.js assigns innerHTML from variable without CSP; DOM-XSS risk.
• external_host_github_pages crx mlionltd.github.io in js_external_hosts — ephemeral third-party host outside dev domain.
• no_developer_name store developer_name is empty string; verified_publisher badge present but no display name.
• csp_absent manifest content_security_policy is null; no CSP protection for MV3 extension.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Tokyo Revengers Gameograf [adware] + malext.io malicious_extension_sentry; score 5.14 -> 7.64 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows overriding search provider; newtab override amplifies monetization risk.
• chrome_url_overrides.newtab high Replaces new-tab page — primary monetization/traffic-hijack surface.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.

Pillar Scores

Bookkeeping