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Video DownloadHelper

Version 10.2.40.2 View in Chrome Web Store

Last scanned: about 4 hours ago

Extension Details

Developer: SAS ACLAP

Rating: 4.4 ★ (31.7K ratings)

Users: 5,000,000

Context-Aware Verdict

CRITICAL

Overall Risk

Trust Factors:

Video DownloadHelper has strong legitimacy indicators with 5 million users, a solid 4.4-star rating from over 31,000 reviews, and is developed by SAS ACLAP, a known company in this space. The extension's core functionality of downloading videos from various platforms aligns with its requested permissions, suggesting legitimate business purpose rather than malicious intent.

Concerns:

The extension's critical risk rating stems from its extensive permission set that creates significant attack surface. The combination of webRequest interception, broad host permissions across all URLs, and unsafe WebAssembly execution creates potential for data theft, request manipulation, and hidden malicious code execution. While the tabs, downloads, and webNavigation permissions are functionally necessary for video downloading, they also enable comprehensive browsing surveillance. The unlimited storage permission could facilitate large-scale data collection. The specific content script injections across major video platforms (YouTube, Vimeo, Facebook, etc.) are expected but expand the potential impact zone.

Recommendations:

Given the critical risk level, install this extension in a dedicated Chrome profile isolated from sensitive browsing activities. Avoid using it while logged into important accounts or accessing confidential information. Regularly review the extension's behavior and consider alternatives with more limited permissions if available. The high user base and ratings suggest the developer is likely trustworthy, but the extensive permissions create inherent risks that warrant careful containment.

Findings

HIGH

Broad Host Permissions

This extension has broad host permissions allowing it to access many or all websites. This could potentially be used to steal sensitive data or track browsing activity.

HIGH

High-Risk Permission: downloads

This extension has the downloads permission. Can download files and access download history. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: tabs

This extension has the tabs permission. Can access browser tab information and manipulate tabs. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: webNavigation

This extension has the webNavigation permission. Can track your web navigation. This could potentially be used maliciously to compromise security or privacy.

HIGH

High-Risk Permission: webRequest

This extension has the webRequest permission. Can intercept and modify web requests. This could potentially be used maliciously to compromise security or privacy.

HIGH

Unsafe WebAssembly Execution

This extension's Content Security Policy allows 'wasm-unsafe-eval', which permits potentially dangerous WebAssembly code execution. This could be used to hide malicious code or perform CPU-intensive operations.

MEDIUM

Medium-Risk Permission: contextMenus

This extension has the contextMenus permission. Can add items to the context menu.

MEDIUM

Medium-Risk Permission: notifications

This extension has the notifications permission. Can show notifications.

MEDIUM

Medium-Risk Permission: storage

This extension has the storage permission. Can store data locally.

MEDIUM

Medium-Risk Permission: unlimitedStorage

This extension has the unlimitedStorage permission. Can store unlimited data locally.

Security Analysis Details

Required Permissions:

tabs
offscreen
downloads
sidePanel
webRequest
webNavigation
scripting
declarativeNetRequest
storage
notifications
contextMenus
unlimitedStorage

Optional Permissions:

browsingData
downloads.open

Host Permissions:

<all_urls>

Content Security Policy:

extension_pages: script-src 'self' 'wasm-unsafe-eval'

Embedded URLs (81 total):

https://json-schema.org/draft/2020-12/schema	http://json-schema.org/draft-07/schema#
https://v10.downloadhelper.net:443	https://help.downloadhelper.net
https://help.downloadhelper.net/article/17-play	https://support.mozilla.org/en-US/kb/where-find-and-manage-downloaded-files-firefox#w_change-where-downloads-are-saved
https://support.mozilla.org/en-US/kb/extensions-private-browsing#w_enabling-or-disabling-extensions-in-private-windows	https://github.com/shadcn-ui/ui/issues/669
https://tailwindcss.com/docs/customizing-colors	https://github.com/aclap-dev/vdh/issues/309
https://github.com/highlightjs/highlight.js/issues/2277	https://github.com/highlightjs/highlight.js/wiki/security
https://help.downloadhelper.net/article/15-smartnaming	https://github.com/WebCoder49/code-input
https://github.com/aclap-dev/vdhlocales/wiki/HowTo	https://github.com/primer/github-syntax-dark
https://a.com	https://vk.com/al_video.php
https://vk.com	https://api.live.vkvideo.ru/v1/channel/
https://api.live.vkvideo.ru/v1/blog/	https://www.osmosis.org/videoPlaylist?hash=
https://www.osmosis.org	https://kick.com/api/v2/channels/
https://kick.com/api/v1/video/	https://kick.com/api/v2/clips/
http://www.w3.org/1999/xhtml	http://www.w3.org/2000/svg
http://www.w3.org/XML/1998/namespace	http://www.w3.org/2000/xmlns/
https://example.com	https://ok.ru/videoembed/
https://en.twitcasting.tv/streamserver.php?target=	https://thumb.live.mmcdn.com/ri/
https://api.bilibili.tv/intl/gateway/web/playurl?s_locale=en_US&platform=web&ep_id=	https://api.bilibili.tv/intl/gateway/web/playurl?s_locale=en_US&platform=web&aid=
https://api.bilibili.com/x/web-interface/nav	https://api.bilibili.com/x/player/wbi/playurl?
https://www.youtube.com	https://music.youtube.com
https://suggestqueries-clients6.youtube.com	https://upload.youtube.com/
https://youtubei.googleapis.com	https://www.youtube.com/youtubei/
https://youtubei.googleapis.com/youtubei/	https://green-youtubei.sandbox.googleapis.com/youtubei/
https://release-youtubei.sandbox.googleapis.com/youtubei/	https://test-youtubei.sandbox.googleapis.com/youtubei/
http://cami-youtubei.sandbox.googleapis.com/youtubei/	https://uytfe.sandbox.google.com/youtubei/
https://www.google.com/	https://github.com/LuanRT
https://github.com/sponsors/LuanRT	https://github.com/wykerd/
https://github.com/MasterOfBob777	https://github.com/patrickkfkan
https://github.com/akkadaska	https://github.com/absidue
https://esm.sh/@bufbuild/protobuf@2.0.0/wire	https://github.com/LuanRT/YouTube.js.git
https://github.com/LuanRT/YouTube.js/issues	https://github.com/LuanRT/YouTube.js#readme
http://www.w3.org/2001/XMLSchema-instance	http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd
http://dashif.org/thumbnail_tile	https://ytjs.googlevideo.com/videoplayback?expire=1234567890&
https://ytjs.dev/guide/getting-started.html#providing-a-custom-javascript-interpreter	http://oauth.net/grant_type/device/1.0
http://gdata.youtube.com	https://www.googleapis.com/auth/youtube-paid-content
https://www.youtube.com/tv	https://www.youtube.com/embed/
https://clients2.google.com/service/update2/crx	https://downloadhelper.net
https://v10.downloadhelper.net/activate	https://app.v10.downloadhelper.net/activate
https://v10.downloadhelper.net/changelog	https://app.v10.downloadhelper.net/changelog
https://chromewebstore.google.com/detail/video-downloadhelper/lmjnegcaeklhafolokijcfjliaokphfk	https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/

Page 1 of 2

Raw Manifest

{
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqm/Cdcx4ikjVJbadUGpwrgJXdkc6Is8smuMiuAQbzgOg0cETVxuAY55UxgCxsh3lu4Os0RFK11bMBhu79Jbwv8tyml6mFGLLncLU2dFPZwnZWnIt5U+KC+uOvjryOacIPLxS/PeF2sXScNd0QJg/wTyl5WIizFtbcM3ZmFDFsj39FuUoH/OhO1Ux1/4Xn6dbSRb5F6qgkS2CU9ptTPQz0NJNaEmbL7vnWQkl2C8N4SjlDpRf/lC5r72Ow16hmbNmCGRhbxjPF0Dm+EO2uyF6dBw4n9V8BjBXQ7AdL5J3k4dXJk/oIOD2GQJsGyHK6TobNPPjy6W7bpPBtSfesIXS+wIDAQAB",
  "name": "Video DownloadHelper",
  "icons": {
    "128": "bitmaps/logo-128-color.png"
  },
  "action": {
    "default_icon": {
      "128": "bitmaps/logo-128-color.png"
    },
    "default_title": "Video DownloadHelper"
  },
  "author": "Video DownloadHelper Team",
  "version": "10.2.40.2",
  "commands": {
    "default-action": {
      "description": "Execute default action",
      "suggested_key": {
        "mac": "Ctrl+Shift+Down",
        "default": "Alt+Down"
      }
    },
    "_execute_action": {
      "suggested_key": {
        "mac": "Ctrl+Shift+Up",
        "default": "Alt+Up"
      }
    }
  },
  "background": {
    "type": "module",
    "service_worker": "service/main.js"
  },
  "side_panel": {
    "default_icon": {
      "128": "bitmaps/logo-128-color.png"
    },
    "default_path": "/content/sidebar.html",
    "default_title": "Video DownloadHelper"
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "__MSG_appDesc__",
  "permissions": [
    "tabs",
    "offscreen",
    "downloads",
    "sidePanel",
    "webRequest",
    "webNavigation",
    "scripting",
    "declarativeNetRequest",
    "storage",
    "notifications",
    "contextMenus",
    "unlimitedStorage"
  ],
  "homepage_url": "https://downloadhelper.net",
  "default_locale": "en",
  "content_scripts": [
    {
      "js": [
        "injected/youtube.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.youtube.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/youtube_untrusted.js"
      ],
      "world": "MAIN",
      "run_at": "document_end",
      "matches": [
        "*://*.youtube.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/vimeo.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_start",
      "matches": [
        "*://*.vimeo.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/vimeo_untrusted.js"
      ],
      "world": "MAIN",
      "run_at": "document_start",
      "matches": [
        "*://*.vimeo.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/facebook.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.facebook.com/*",
        "*://*.instagram.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/ok.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.ok.ru/*",
        "*://*.m.ok.ru/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/vk.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.vk.com/*",
        "*://*.vk.ru/*",
        "*://*.vkvideo.ru/*",
        "*://live.vkvideo.ru/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/canva.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.canva.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/iq.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.iq.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/iq_untrusted.js"
      ],
      "world": "MAIN",
      "run_at": "document_end",
      "matches": [
        "*://*.iq.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/twitcasting.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.twitcasting.tv/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/bilibili.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.bilibili.tv/*",
        "*://*.bilibili.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/bilibili_untrusted.js"
      ],
      "world": "MAIN",
      "run_at": "document_end",
      "matches": [
        "*://*.bilibili.tv/*",
        "*://*.bilibili.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/taiav.js"
      ],
      "world": "MAIN",
      "run_at": "document_end",
      "matches": [
        "*://*.taiav.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/osmosis.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.osmosis.org/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/kick.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.kick.com/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/chaturbate.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "*://*.chaturbate.com/*",
        "*://*.chaturbate.eu/*",
        "*://*.chaturbate.global/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "injected/activate.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_start",
      "matches": [
        "https://v10.downloadhelper.net/activate*",
        "https://app.v10.downloadhelper.net/activate*"
      ]
    },
    {
      "js": [
        "injected/changelog.js"
      ],
      "world": "ISOLATED",
      "run_at": "document_end",
      "matches": [
        "https://v10.downloadhelper.net/changelog*",
        "https://app.v10.downloadhelper.net/changelog*"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "manifest_version": 3,
  "optional_permissions": [
    "browsingData",
    "downloads.open"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'"
  }
}

by ✦ Astarte

Video DownloadHelper

Extension Details

Context-Aware Verdict

Findings

Security Analysis Details

Required Permissions:

Optional Permissions:

Host Permissions:

Content Security Policy:

Embedded URLs (81 total):

Raw Manifest

Detections

Manifest Findings