Examine source code of radiofrance

{
  "manifest_version": 2,
  "name": "radiofrance",
  "description": "Listen to music (FIP, Mouv, Musique) and news and broadcasts in French (Inter, Culture, Info) from radiofrance",
  "version": "1.6.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "alarms"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.radiofrance.fr/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "background": {
    "page": "player.html",
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "player@radiofrance.fr"
    }
  },
  "browser_action": {
    "default_title": "radiofrance",
    "default_popup": "remote.html"
  }
}