Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Manchester City Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override combined with search permission creates search-monetization surface on every new tab.
• Privacy policy is Google's generic policy — not scoped to this extension, admits data collection and third-party sharing (→ Privacy pillar max).
• Both install and uninstall URL hijacks detected, redirecting users to developer domain on lifecycle events.
• Seven external JS hosts contacted (chatgpt.com, instagram, youtube, x.com, google, chrome.google.com, owhit.com) with no CSP — broad exfil surface.

Evidence

• newtab_override manifest chrome_url_overrides.newtab → index.html replaces every new tab; primary monetization/exfil surface.
• install_uninstall_hijack crx onInstalled → owhit.com/manchester-city-wallpaper; onUninstall → owhit.com/uninstall. Both lifecycle hijacks present.
• generic_privacy_policy store Privacy URL is Google's own policy (myaccount.google.com); scope_extension=false, data_collection=true, third_party_sharing=true.
• no_csp manifest content_security_policy is null; csp_present=false on MV3 NewTab extension with 7 external JS hosts.
• external_hosts crx JS contacts chatgpt.com, instagram.com, x.com, youtube.com, google.com, chrome.google.com, owhit.com — 7 distinct domains.
• new_tab_with_search_permission manifest NewTab + search permission combo is a known search-monetization shell pattern.
• no_rating_low_installs store 35 installs, rating 0, no verified publisher — minimal accountability or trust signals.
• cve_none crx cve_findings_raw is empty; jquery 3.7.1 bundled — no known CVEs at this version.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Manchester City Wallpaper [adware] + malext.io malicious_extension_sentry; score 4.97 -> 7.47 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows overriding or querying search settings; paired with newtab override raises monetization risk.
• chrome_url_overrides.newtab high Replaces every new tab page; primary attack surface for ad/search monetization shells.

Pillar Scores

Bookkeeping