Netskope Extension Risk

Detail view · rubric v3.6
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Video Download Helper

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Risk Score
3.27
Risk Level: Low
Recommendation: 🟢 LOW RISK — review
Category VideoDownloader
Installs 6,000,000
Rating 4.5
Last updated 2026-08-03 (1 months ago)
Manifest version MV3
CSP present ✅ yes
Developer support@downloadhelper.net
Verified publisher ❌ no
Featured by Google ✅ yes
Privacy policy link
Web Store open ↗

Top Risks

  • webRequest + <all_urls> provides broad network visibility across every site visited.
  • No developer name listed; identity accountability gap.
  • Uninstall URL hijack flag set; extension registers an uninstall redirect.
  • Privacy policy scoped to extension but lacks retention disclosure and third-party silence noted.
  • 12 distinct external JS hosts contacted including a.com (ambiguous domain).

Evidence

  • broad_host_access manifest <all_urls> host permission paired with webRequest and scripting; justified for VideoDownloader category.
  • uninstall_url_hijack crx install_url_hijack=false but uninstall_url_hijack=true; extension registers uninstall redirect to unknown target.
  • no_developer_name store developer_name is empty string; only email support@downloadhelper.net identifies developer.
  • external_hosts crx 12 external JS hosts including a.com, bilibili, vk, youtube APIs; >3 distinct registrable domains.
  • featured_by_google store is_featured_by_google=true; follows recommended practices badge present.
  • privacy_policy_retention api Policy fetched, scoped, no data collection stated, but retention not disclosed and third_party_silence=true.
  • cve_clean crx cve_findings_raw empty; no known vulnerable JS libraries bundled.
  • code_quality_clean crx code_findings_raw empty, obfuscation_score=0.0; 28 JS files scanned with no dangerous patterns detected.

Permissions Breakdown

  • tabs medium Can read tab URLs and metadata; needed for video detection across sites.
  • offscreen low Creates offscreen document for background processing; low abuse potential.
  • downloads medium Can trigger file downloads; core to stated functionality.
  • sidePanel low Shows side panel UI; cosmetic/UX risk only.
  • webRequest high Can observe all network requests; sensitive but core to video URL interception.
  • webNavigation medium Tracks navigation events; used to detect video page loads.
  • scripting medium Can inject scripts into pages; paired with <all_urls> increases reach.
  • declarativeNetRequest medium Can modify/block network requests declaratively.
  • storage low Local settings storage; minimal risk.
  • notifications low Desktop notifications for download status.
  • contextMenus low Adds right-click menu items; cosmetic.
  • unlimitedStorage low Extended storage quota; needed for large media caching.
  • <all_urls> high Host access to all URLs; broad but justified for video detection across any site.

Pillar Scores

Permissions4.50
Reputation5.50
Network2.50
Webstore4.50
Maintenance0.00
Privacy2.00
Code Quality0.00
CVE Exposure0.00

Scoring History

sssiedneb23ce5bdp727562726963xsx 3.06 Low review 2026-09-07
%22fsssiedxa sssiedx 3.24 Low review 2026-08-08
&#x27;fsssiedxafdsaxax><!--></ScRiPt>asddsssiedx 3.23 Low review 2026-08-08
3.15 Low review 2026-08-08
fsssiedxa$"sssiedx 3.13 Low review 2026-08-08
<fsssiedxi xx psssiedx 3.03 Low review 2026-08-03
<fsssiedxi$'sssiedx 3.00 Low review 2026-08-03
<fsssiedxafdsaxax><!--></ScRiPt>asddsssiedx 3.38 Low review 2026-08-03
<fsssiedxa 3.02 Low review 2026-08-03
fsssiedx<sssiedx 2.97 Low review 2026-08-03
fsssiedxa<sssiedx 2.77 Low review 2026-08-01
fsssiedxafdsaxax><!--></ScRiPt>asddsssiedx 2.94 Low review 2026-08-01
fsssiedxa"sssiedx 2.88 Low review 2026-08-01
fsssiedxa 2.93 Low review 2026-08-01
fsssiedxa$'sssiedx 2.77 Low review 2026-08-01
sssieddrubricxsx 3.17 Low review 2026-08-01
v3.6 3.27 Low review 2026-06-16

Bookkeeping

Rubric v3.6
Scored at 2026-06-16 07:53
Listing SHA 0f92d8795b2f…
Force block — not fired
Score recovered no
Elapsed 22.1s