Examine source code of FIP Radio

{
  "name": "__MSG_extension_name__",
  "version": "1.6.6",
  "description": "__MSG_extension_description__",
  "manifest_version": 2,
  "minimum_chrome_version": "42",
  "default_locale": "fr",
  "background": {
    "scripts": [
      "background/bundle.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options/index.html",
    "chrome_style": true,
    "open_in_tab": false
  },
  "permissions": [
    "alarms",
    "identity",
    "https://www.fip.fr/latest/api/*",
    "https://direct.fipradio.fr/*"
  ],
  "browser_action": {
    "default_icon": "resources/fip.png",
    "default_title": "__MSG_extension_name__",
    "default_popup": "now-playing/index.html"
  },
  "icons": {
    "16": "resources/fip.png",
    "48": "resources/fip.png",
    "128": "resources/fip.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7037295b-6800-4f2c-a518-ed5f3dd41733}"
    }
  }
}