Examine source code of Notes For YouTube (Alpha)

{
  "description": "Personal extension for taking notes on YouTube videos",
  "manifest_version": 2,
  "name": "Notes With Timestamp",
  "version": "1.4",
  "sidebar_action": {
    "default_title": "Notes With Timestamp",
    "default_panel": "sidebar/panel.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "file:///*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{41ce7ccf-5896-4a6c-b5d3-02108dbeee66}"
    }
  }
}