Windowed Fullscreen for Videos

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Windowed Fullscreen for Videos",
  "version": "1.0.0",
  "description": "Adds a windowed fullscreen button to all videos.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "css": [
        "style.css"
      ],
      "js": [
        "init.js"
      ],
      "all_frames": true
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "action": {
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": true
  },
  "permissions": [
    "storage"
  ]
}