Examine source code of Wandertab

{
  "manifest_version": 2,
  "default_locale": "en",
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "version": "1.17.0",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "geolocation",
    "storage",
    "unlimitedStorage",
    "tabs",
    "https://google.com/*"
  ],
  "optional_permissions": [
    "bookmarks",
    "search"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "__MSG_extension_name__"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{854d3af2-5b9a-4bf4-9e48-74d9221854dd}"
    }
  }
}