Examine source code of WhatsApp Privacy Filter

{
  "manifest_version": 2,
  "name": "__MSG_app_title__",
  "version": "2.3",
  "description": "__MSG_app_description__",
  "default_locale": "en",
  "permissions": [
    "tabs",
    "storage",
    "scripting",
    "*://web.whatsapp.com/*"
  ],
  "background": {
    "scripts": [
      "app/background/background.js"
    ]
  },
  "web_accessible_resources": [
    "app/background/contentScripts/content.js",
    "app/background/contentStyles/blur/chatBoxMessageBox.css",
    "app/background/contentStyles/blur/chatBoxTitle.css",
    "app/background/contentStyles/blur/myAvatar.css",
    "app/background/contentStyles/blur/recentMessageAvatar.css",
    "app/background/contentStyles/blur/recentMessageContent.css",
    "app/background/contentStyles/screen/fullScreen.css"
  ],
  "browser_action": {
    "default_title": "__MSG_app_title__",
    "default_popup": "app/public/index.html",
    "default_icon": {
      "16": "app/public/logo-new.png",
      "48": "app/public/logo-new.png",
      "128": "app/public/logo-new.png"
    }
  },
  "icons": {
    "16": "app/public/logo-new.png",
    "48": "app/public/logo-new.png",
    "128": "app/public/logo-new.png"
  },
  "content_security_policy": "script-src 'self' 'sha256-Bm6SGASuSJ/y5W6tMmcnxeShdKrQ2QtIV2mH1Oh8qho='; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{8d4d41ca-5d76-4ac2-81e5-ec91acb95e4a}"
    }
  }
}