Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — PUBG Battlegrounds Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with uninstall URL hijack and install URL hijack — classic monetization/tracking shell pattern.
• No CSP defined; innerHTML DOM-XSS sink in popup.js amplifies XSS risk.
• 14 months without update; stale newtab extension with search override.
• No developer name listed on store despite verified publisher status.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces every new tab for all users.
• uninstall_url_hijack crx setUninstallURL points to gameograf.com with UTM tracking params on uninstall.
• install_url_hijack crx onInstalled opens gameograf.com with UTM tracking params.
• no_csp manifest content_security_policy is null; MV3 default applies but no explicit hardening.
• dom_xss_sink crx innerHTML used with variable in popup.js without CSP or sanitization visible.
• stale_extension store Last updated 14 months ago; newtab+search category with no recent maintenance.
• verified_publisher store Verified publisher badge present; developer domain resolves and is not throwaway.
• privacy_policy_adequate api Policy scoped to extension, discloses data collection, retention, and third-party sharing.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — PUBG Battlegrounds Gameograf [adware] + malext.io malicious_extension_sentry; score 4.31 -> 6.81 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Search API allows changing default search provider; medium risk for NewTab extensions.
• host_permissions: https://api.gameograf.com/* low Scoped to dev-controlled domain only; narrow host access.
• chrome_url_overrides.newtab medium Replaces new-tab page; typical for this category but monetization vector.

Pillar Scores

Bookkeeping