Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Volume Booster [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Privacy policy is Google's generic account policy — not scoped to this extension, yet admits data collection and third-party sharing (Privacy pillar 10.0).
• Uninstall URL hijacks to jointoucan.com affiliate link — classic monetization shell signal (+3.0 Webstore).
• Broad host permissions (<all_urls> tripled) paired with tabCapture enables full audio/page capture on every site visited.
• Developer email is free-webmail (gmail), no developer name, no business domain — low identity accountability.

Evidence

• uninstall_url_hijack crx chrome.runtime.setUninstallURL → https://jointoucan.com/partners/volumebooster (affiliate/monetization redirect).
• privacy_policy_generic store Policy URL is Google's own account policy; scope_extension=false, data_collection=true, third_party_sharing=true.
• broad_host_permissions manifest http://*/*, https://*/*, and <all_urls> all declared simultaneously — redundant and maximally broad.
• free_webmail_dev_no_name store Developer email alexanderkcheng@gmail.com, developer_name empty; no business domain identity.
• verified_publisher_featured store Both verified_publisher=true and is_featured_by_google=true; discounts applied but capped due to monetization signal.
• js_external_host crx jointoucan.com referenced as external JS host — same domain as affiliate uninstall URL.
• no_csp manifest content_security_policy is null; csp_present=false on MV3 extension.
• tab_capture_all_urls manifest tabCapture + <all_urls> content_scripts enables audio capture on every site user visits.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Volume Booster [adware] + malext.io malicious_extension_sentry; score 5.01 -> 7.51 (+2.5 cap 2.5).

Permissions Breakdown

• tabCapture high Can capture audio/video from any tab — core function but high capability.
• activeTab medium Access to currently active tab content on user interaction.
• offscreen low Offscreen document for audio processing; low standalone risk.
• storage low Stores extension settings locally.
• unlimitedStorage low No storage quota; low direct risk.
• windows low Window enumeration; low risk.
• http://*/* high Broad host access to all HTTP sites.
• https://*/* high Broad host access to all HTTPS sites.
• <all_urls> high Catch-all host permission — redundant triple coverage amplifies risk.

Pillar Scores

Bookkeeping