Examine source code of VirusTotal Sidekick

{
  "manifest_version": 2,
  "name": "VirusTotal Sidekick",
  "version": "0.3.2",
  "author": "hejay",
  "description": "Right-click any link to check it on VirusTotal in two clicks. Hash lookups stay private, file uploads need your consent, and results are cached locally to save time.",
  "permissions": [
    "contextMenus",
    "storage",
    "notifications",
    "https://www.virustotal.com/*"
  ],
  "optional_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "icons": {
    "48": "icon.png"
  },
  "content_security_policy": "default-src 'self'; script-src 'self'; object-src 'none'; connect-src https: http:",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ebbf9366-6f16-4f73-9a04-945be87a3b3c}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}