YouTube Windowed FullScreen

manifest.json

{
  "manifest_version": 2,
  "name": "YouTube Windowed FullScreen",
  "short_name": "YouTube FullScreen",
  "description": "Watch videos on YouTube fullscreen within your browsers screen.",
  "version": "3.8",
  "page_action": {
    "default_icon": {
      "16": "icon16.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png"
    }
  },
  "content_scripts": [
    {
      "js": [
        "YouTube.fullbrowser.js"
      ],
      "css": [
        "YouTube.fullbrowser.css"
      ],
      "matches": [
        "*://www.youtube.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "chrome_style": true
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "57.0a1",
      "id": "{59c55aed-bdb3-4f2f-b81d-27011a689be6}"
    }
  }
}