Top Risks

• Privacy policy is generic Google account policy (scope_extension==false, data_collection==true, third_party_sharing==true) — worst-case Privacy score.
• Install and uninstall URL hijack flags set — extension opens/redirects on install/uninstall events.
• Developer uses free Gmail account with no verifiable business identity; featured badge partially mitigates.
• <all_urls> host permission paired with declarativeNetRequest allows CSP stripping on every site, significant attack surface.
• External JS host webbrowsertools.com detected; unknown third-party domain increases supply-chain risk.

Evidence

• install_url_hijack crx install_url_hijack=true; extension opens a URL on install — target unresolved.
• uninstall_url_hijack crx uninstall_url_hijack=true; extension sets uninstall redirect URL — target unresolved.
• privacy_policy_generic store Policy is Google account policy: fetched=true, scope_extension=false, data_collection=true, third_party_sharing=true.
• free_webmail_developer store Developer email mujo.hydrov@gmail.com; no verified business domain; domain_age_ct not queried.
• external_js_host crx js_external_hosts=[webbrowsertools.com]; unknown third-party domain in extension code.
• broad_host_permission manifest host_permissions=[<all_urls>] combined with declarativeNetRequest; can strip CSP headers on all sites.
• is_featured_by_google store Extension carries Google Featured badge, providing partial legitimacy signal.
• operator_cluster_email_siblings api sibling_counts_by_dim.dev_email=2; same Gmail account linked to 2 extensions; compound sibling_count=0.

Permissions Breakdown

• storage low Stores extension settings locally; minimal risk.
• declarativeNetRequest medium Can modify/block network requests including CSP headers; significant capability.
• <all_urls> (host_permission) high Broad host access enabling declarativeNetRequest rules to apply on every site visited.

Pillar Scores

Scoring History

Bookkeeping