Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Batman Gotham City Stormy Night Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy URL returns HTTP error — policy effectively absent, score 10.0.
• NewTab override with uninstall URL hijack and install URL hijack — monetization shell pattern.
• Two DOM-XSS innerHTML sinks (popup.js, calendar.js) with no CSP enforced.
• No developer name listed; verified publisher discount partially applied.

Evidence

• privacy_policy_fetch_failed api privacy_policy_classification.fetched==false (HTTPError); policy treated as absent → privacy pillar 10.0.
• uninstall_url_hijack crx chrome.runtime.setUninstallURL → gameograf.com with UTM params; webstore +3.0.
• install_url_hijack crx onInstalled opens gameograf.com with UTM params; webstore +2.0.
• newtab_override manifest chrome_url_overrides.newtab = newtab.html; monetization-shape NewTab extension.
• dom_xss_sinks crx innerHTML from variable in popup.js and calendar.js; no CSP to mitigate.
• no_csp manifest content_security_policy is null; MV3 default applies but no explicit hardening.
• verified_publisher store Verified publisher badge present; reputation discount applied (capped at -1.0 per v3.5-E due to newtab monetization pattern).
• no_developer_name store developer_name is empty string; +1.0 reputation penalty applied.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Batman Gotham City Stormy Night Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.68 -> 7.18 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/modifying search queries; medium risk for a NewTab extension.
• host_permissions: https://api.gameograf.com/* low Scoped to own API domain only; low blast radius.
• chrome_url_overrides.newtab medium Replaces new-tab page; primary vehicle for monetization/search hijack.

Pillar Scores

Bookkeeping