Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Witcher Live Wallpaper by Gameograf [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 without extension context.
• NewTab override + search permission creates monetization/search-redirect surface; uninstall and install URL hijacks confirmed.
• Two innerHTML DOM-XSS sinks with no CSP amplify risk of script injection via calendar or API data.
• No developer name listed; verified publisher badge present but policy is generic Google URL, limiting trust discount.

Evidence

• newtab_override manifest chrome_url_overrides.newtab present; extension replaces every new tab with custom page.
• privacy_policy_generic store Policy URL is myaccount.google.com/privacypolicy — Google's own policy, not scoped to this extension. scope_extension=false, data_collection=true, third_party_sharing=true.
• uninstall_url_hijack crx setUninstallURL points to gameograf.com with UTM tracking params.
• install_url_hijack crx onInstalled opens gameograf.com with UTM tracking params.
• dom_xss_sinks crx Two innerHTML assignments from variables 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 declared.
• verified_publisher store Verified publisher badge present; however generic privacy policy limits full discount (invariant 0c/E not triggered but policy is inadequate).
• no_developer_name store developer_name is empty string; identity relies solely on email domain.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Witcher Live Wallpaper by Gameograf [adware] + malext.io malicious_extension_sentry; score 4.83 -> 7.33 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/modifying search provider; pairs with newtab override for monetization surface.
• host_permissions: https://api.gameograf.com/* low Scoped to own API domain; no broad host access.
• chrome_url_overrides.newtab medium Replaces new-tab page; prime real-estate for monetization and search redirect.

Pillar Scores

Bookkeeping