Examine source code of Video PiP Shortcut

{
  "manifest_version": 3,
  "name": "Video PiP Shortcut",
  "description": "Adds a Picture‑in‑Picture overlay button and a customisable keyboard shortcut to HTML5 videos.",
  "version": "1.13",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "video-pip-shortcut@beficent.github.io",
      "strict_min_version": "153.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "options_page": "options.html",
  "action": {
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png"
    },
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "settings-config.js",
        "content.js"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "match_origin_as_fallback": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icon.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon.png"
  }
}