Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Frieren and Himmel Winter Journey Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic policy — not scoped to this extension; admits data collection and 3rd-party sharing (+10 privacy pillar).
• NewTab override replaces every new tab; uninstall URL hijack and install URL hijack both redirect to gameograf.com with UTM tracking.
• Two innerHTML DOM-XSS sinks with no CSP present — no mitigation against injected content.
• No developer name listed in store; verified publisher status provides partial accountability only.

Evidence

• newtab_override manifest chrome_url_overrides.newtab = newtab.html — replaces every new-tab page for all users.
• privacy_policy_generic store Privacy URL is Google's own policy (myaccount.google.com/privacypolicy); scope_extension=false, data_collection=true, third_party_sharing=true.
• 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_sinks_no_csp crx Two innerHTML assignments (popup.js, calendar.js) with csp_present=false — no runtime protection.
• no_developer_name store developer_name is empty string; accountability reduced despite verified_publisher=true.
• verified_publisher store verified_publisher=true; partial accountability credit applied but capped due to generic privacy policy.
• maintenance_6_12mo store months_since_update=9; falls in 6-12mo stale band (+3.5 maintenance).
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Frieren and Himmel Winter Journey Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.69 -> 7.19 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows querying browser search; medium risk on its own but combined with newtab override raises concern.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited reach.
• chrome_url_overrides: newtab medium Replaces every new-tab page; high-reach surface for monetization and data collection.

Pillar Scores

Bookkeeping