Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Brawl Stars Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's own policy—not scoped to this extension; admits data collection and 3rd-party sharing (+10 privacy pillar).
• NewTab override replaces every new tab; uninstall+install URL hijacks send traffic to gameograf.com UTM links.
• Generic Google privacy policy (scope_extension=false, data_collection=true, third_party_sharing=true) qualifies as worse-than-none under v3.5 rule D.
• DOM-XSS sink (innerHTML from variable) in popup.js with no CSP present elevates code quality risk.

Evidence

• newtab_override manifest chrome_url_overrides.newtab = index.html; replaces every new tab page for all users.
• uninstall_url_hijack crx setUninstallURL → https://gameograf.com/?utm_source=uninstall&utm_medium=link&utm_campaign=bg
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=install&utm_medium=link&utm_campaign=bg
• generic_privacy_policy store Privacy URL is Google's account policy; scope_extension=false, data_collection=true, third_party_sharing=true.
• dom_xss_sink crx innerHTML assigned from variable in js/popup.js; no CSP present; potential DOM-XSS.
• no_csp manifest content_security_policy is null; MV3 default applies but no explicit hardening declared.
• external_host_mlionltd_github_io crx js_external_hosts includes mlionltd.github.io — third-party GitHub Pages host, unclear ownership.
• stale_15mo store Last updated May 2025 but months_since_update=15 places it in 6-24mo maintenance band.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Brawl Stars Wallpaper [adware] + malext.io malicious_extension_sentry; score 5.34 -> 7.84 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows querying/overriding search; medium risk in a NewTab context.
• chrome_url_overrides.newtab medium Replaces every new tab with extension page; high-reach monetization surface.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.

Pillar Scores

Bookkeeping