Examine source code of Onion Container

{
  "manifest_version": 2,
  "name": "Onion Container",
  "version": "1.0.1",
  "description": "Open links in a dedicated Tor-routed container. Not a privacy/anonymity tool — see README.",
  "homepage_url": "https://github.com/neekt/onion-container",
  "permissions": [
    "contextMenus",
    "contextualIdentities",
    "cookies",
    "tabs",
    "proxy",
    "storage",
    "browsingData",
    "notifications",
    "webRequest",
    "webRequestBlocking",
    "alarms",
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Onion Container",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "blocked.html",
    "blocked.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{44e9635b-7f69-4654-8e85-59f58b862d0f}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}