Examine source code of MyCCB

{
  "manifest_version": 2,
  "name": "MyCCB",
  "version": "1.5",
  "description": "Ajoute le lecteur de TF1 au stream",
  "icons": {
    "96": "icons/icon.png"
  },
  "browser_action": {
    "default_icon": {
      "96": "icons/icon.png"
    },
    "default_title": "MyCcb",
    "default_popup": "./popup/control.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.twitch.tv/*",
        "*://www.tf1.fr/tf1/direct?context=myccb",
        "*://prod-player.tf1.fr/*"
      ],
      "js": [
        "myccb.js",
        "tf1modifier.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "fullscreen.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1149048c-f5de-4d47-9dfa-03b94b6bc34c}"
    }
  }
}