Examine source code of Pause & Switch

{
  "manifest_version": 2,
  "name": "Pause & Switch",
  "version": "1.0",
  "description": "Keyboard shortcut: pauses any media playing in the current tab, then switches to another tab.",
  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "commands": {
    "pause-and-switch": {
      "suggested_key": {
        "default": "Ctrl+Q"
      },
      "description": "Pause media in this tab and switch tabs"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{a9554331-14ad-4c1f-86eb-59965885edec}"
    }
  }
}