Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — BMW M4 GT4 Live Wallpaper - Gameograf [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override replaces every new tab — prime monetization/tracking surface for 535 users.
• Privacy policy is Google's generic policy (scope_extension=false, admits data collection + 3rd-party sharing) → Privacy pillar 10.0.
• Uninstall URL hijack sends user to gameograf.com on removal — classic monetization shell signal.
• Install URL hijack fires on extension install — unsolicited 3rd-party redirect on every install.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces every new tab page.
• uninstall_url_hijack crx setUninstallURL → https://gameograf.com/?p=33395?utm_source=extension&utm_medium=uninstall
• install_url_hijack crx onInstalled opens https://gameograf.com/?p=33395?utm_source=extension&utm_medium=install
• generic_privacy_policy api Policy URL is Google's generic myaccount policy; scope_extension=false, data_collection=true, third_party_sharing=true.
• dom_xss_sink crx innerHTML assigned from variable in js/calendar.js with csp_present=false — DOM-XSS risk.
• no_csp manifest content_security_policy is null for MV3 extension; default MV3 CSP applies but no explicit hardening.
• verified_publisher store verified_publisher=true for gameograf.com (resolves, not throwaway) — partial reputation credit.
• no_developer_name store developer_name is empty string; reduces accountability.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — BMW M4 GT4 Live Wallpaper - Gameograf [adware] + malext.io malicious_extension_sentry; score 5.32 -> 7.82 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows querying the browser search engine — risk elevated for NewTab/search-override context.
• alarms low Schedules periodic callbacks; minimal standalone risk.
• storage low Local key-value storage; low risk alone.
• chrome_url_overrides.newtab high Replaces every new-tab page — high reach, monetization attack surface.
• host_permissions: https://api.gameograf.com/* medium Scoped to dev's own API; acceptable in principle but opaque data flow.

Pillar Scores

Bookkeeping