Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Smart Adblocker [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• install_url_hijack: onInstalled opens youtube.com — benign target but hijack pattern present
• No developer name listed in store; reduces accountability
• Content scripts on <all_urls> including YouTube give broad DOM access on every page
• js_external_hosts includes react.dev — MV3 + no CSP means external JS host is a supply-chain risk

Evidence

• verified_publisher + featured store Both verified-publisher badge and Google featured badge present; strong positive trust signal.
• install_url_hijack manifest onInstalled opens https://www.youtube.com/ — hijack pattern exists, target is benign but worth flagging.
• host_permission_all_urls manifest <all_urls> host permission with content_scripts on all URLs; justified by Adblock category.
• js_external_hosts crx react.dev, smartadblocker.com, www.youtube.com listed as external JS hosts. react.dev is a CDN risk.
• no_csp manifest content_security_policy is null (MV3 default applies, but no explicit hardening).
• privacy_policy_classification api Policy fetched, scoped to extension, discloses collection, retention, and third-party sharing.
• code_findings_raw_empty crx 16 JS files scanned; no suspicious patterns detected, obfuscation_score=0.0.
• no_developer_name store developer_name is empty string; reduces accountability despite verified publisher badge.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Smart Adblocker [adware] + malext.io malicious_extension_sentry; score 2.19 -> 4.69 (+2.5 cap 2.5).

Permissions Breakdown

• declarativeNetRequest medium Core adblock capability; blocks network requests. Expected for Adblock category.
• declarativeNetRequestFeedback low Read-only feedback on blocked requests; minor telemetry risk.
• storage low Local config persistence only.
• tabs medium Can read tab URLs and metadata across all open tabs.
• <all_urls> (host_permission) high Broad host access required for adblock function; justified but amplifies any compromise.

Pillar Scores

Bookkeeping