Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Yoriichi Tsugikuni Demon Slayer Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• New-tab override with uninstall-URL hijack and install-URL hijack — classic monetization shell pattern.
• No developer name listed; verified publisher but anonymous operator increases accountability gap.
• DOM-XSS sinks (innerHTML from variable) in popup.js and calendar.js with no CSP — elevated XSS risk.
• Search permission paired with newtab override enables full search-provider capture.

Evidence

• newtab_override manifest chrome_url_overrides.newtab = newtab.html — replaces every new-tab page for all users.
• uninstall_url_hijack crx setUninstallURL → https://gameograf.com/?utm_source=gameograf&utm_medium=link&utm_campaign=bg&utm_content=uninstall
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=install&utm_medium=link&utm_campaign=bg&utm_content=install
• dom_xss_sink crx innerHTML assigned from variable in popup.js and calendar.js; no CSP mitigates exploitation.
• no_csp manifest content_security_policy is null; MV3 default CSP applies but no explicit hardening declared.
• no_developer_name store developer_name is empty string; operator identity relies solely on email domain.
• verified_publisher store Verified publisher badge present for gameograf.com; domain resolves and not throwaway.
• privacy_policy_adequate api Policy fetched, scoped to extension, discloses data collection, retention, and third-party sharing.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Yoriichi Tsugikuni Demon Slayer Gameograf [adware] + malext.io malicious_extension_sentry; score 3.22 -> 5.72 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows overriding search provider; paired with newtab override amplifies monetization risk.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain only.
• chrome_url_overrides.newtab medium Replaces new-tab page — classic monetization shell vector.

Pillar Scores

Bookkeeping