Top Risks

• Uninstall URL hijack to chromewallpaper.com — classic traffic-monetization shell signal.
• Install URL hijack opens 3rd-party chromewallpaper.com page on installation.
• Privacy policy is Google's generic account policy — not scoped to this extension at all; collects & shares data per that policy.
• NewTab override + search permission with free-webmail dev, no verified publisher, no developer name.
• External JS hosts include chatgpt.com, netflix.com, instagram.com, x.com — far beyond wallpaper functionality.

Evidence

• uninstall_url_hijack manifest chrome.runtime.setUninstallURL -> https://chromewallpaper.com/uninstall; textbook monetization shell (+3.0 Webstore).
• install_url_hijack manifest onInstalled opens https://chromewallpaper.com/hatsune-miku-wallpapers-vocaloid-anime-backgrounds (+2.0 Webstore).
• newtab_override manifest chrome_url_overrides.newtab = index.html; NewTab monetization shape scored under Webstore (+2.0).
• privacy_policy_generic store Policy URL is Google account policy; fetched, scope_extension=false, data_collection=true, third_party_sharing=true → +10.0 Privacy (D rule).
• free_webmail_no_dev_name store developer_email=gmail, developer_name empty, no verified publisher → Reputation floor 7.5.
• excessive_external_hosts crx JS references chatgpt.com, netflix.com, instagram.com, x.com — unrelated to wallpaper function.
• search_permission_newtab_combo manifest search permission + newtab override together enable full search monetization control.
• no_csp manifest content_security_policy is null; MV3 has strict default but no explicit CSP declared.

Permissions Breakdown

• search medium Allows overriding default search; combined with newtab override creates monetization surface.
• chrome_url_overrides.newtab medium Replaces new-tab page entirely; core mechanism for traffic monetization shell.

Pillar Scores

Bookkeeping