Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — McLaren Formula 1 Experience the Speed! New Tab Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with uninstall+install URL hijack to 3rd-party — classic monetization shell pattern.
• Stale 15 months (maintenance score elevated); MV3 but no CSP declared.
• DOM-XSS sink (innerHTML from variable) in popup.js with no CSP protection.
• Developer name missing; no brand verification despite verified-publisher badge.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to index.html — replaces every new tab.
• uninstall_url_hijack crx setUninstallURL to gameograf.com with UTM tracking params.
• install_url_hijack crx onInstalled opens gameograf.com with UTM install tracking params.
• no_csp manifest content_security_policy is null; csp_present=false — MV3 default applies but no explicit policy.
• dom_xss_sink crx popup.js assigns innerHTML from variable; no CSP to mitigate DOM-XSS.
• external_host_github crx mlionltd.github.io listed in js_external_hosts — not developer-controlled domain.
• developer_name_missing store developer_name is empty string despite verified_publisher=true.
• months_stale api 15 months since last update — falls in 12-24mo band (+6.0 maintenance).
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — McLaren Formula 1 Experience the Speed! New Tab Gameograf [adware] + malext.io malicious_extension_sentry; score 4.27 -> 6.77 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Can read and override search queries; medium risk for a NewTab extension.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain only.
• chrome_url_overrides.newtab medium Replaces every new tab — primary monetization and data-capture surface.

Pillar Scores

Bookkeeping