Examine source code of LingoFlip

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.0.0",
  "default_locale": "en",
  "author": "LingoFlip Team",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "settings.js",
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtu.be/*",
        "*://*.netflix.com/*",
        "*://*.udemy.com/*",
        "*://*.babbel.com/*"
      ],
      "js": [
        "settings.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon.svg",
      "96": "icons/icon.svg"
    },
    "default_title": "__MSG_extensionName__"
  },
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8fe19499-fbbd-4a36-b28a-3771e262a7fd}"
    }
  }
}