Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Howl’s Moving Castle Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic policy — does NOT scope to this extension, admits data collection and 3rd-party sharing (+10 privacy pillar).
• NewTab override + search permission forms a search-monetization shell pattern.
• Uninstall and install URL hijacks redirect to gameograf.com tracking URLs.
• No developer name listed; verified publisher discount partially applied but offset by stale+monetization signals.

Evidence

• privacy_policy_generic store PP is Google's own account policy; scope_extension=false, data_collection=true, third_party_sharing=true — triggers +10.0 privacy (D rule).
• newtab_override manifest chrome_url_overrides.newtab=index.html replaces every new tab; combined with search permission = monetization shell.
• install_uninstall_hijack crx Both onInstalled and uninstall URLs redirect to gameograf.com with utm tracking params.
• verified_publisher_capped store verified_publisher=true but months_since_update=16 and monetization shape cap discount to -1.0 per v3.5 invariant 0c/E.
• dom_xss_sink crx innerHTML assigned from variable in popup.js; no CSP present, elevating DOM-XSS risk.
• no_csp manifest content_security_policy is null; MV3 has strict default but absence of explicit CSP noted with innerHTML finding.
• external_host_mlionltd_github_io crx Extension contacts mlionltd.github.io — third-party GitHub Pages host outside developer's own domain.
• stale_update store Last updated May 2025 but months_since_update=16 triggers +6.0 maintenance score (6-12 month band).
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Howl’s Moving Castle Wallpaper [adware] + malext.io malicious_extension_sentry; score 5.14 -> 7.64 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/modifying search queries; medium risk in context of NewTab override.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain only.
• chrome_url_overrides.newtab medium Replaces new tab page — core monetization surface for wallpaper/search shells.

Pillar Scores

Bookkeeping