YouTube Nyan Cat - Meow Meow

manifest.json

{
  "background": {
    "page": "pages/background.html"
  },
  "browser_action": {
    "default_icon": "images/128.png",
    "default_popup": "pages/index.html",
    "default_title": "__MSG_app_name__"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "css": [
        "styles/inject.css"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "default_locale": "en",
  "description": "__MSG_app_description__",
  "homepage_url": "https://www.codehemu.com/p/nyancat.html",
  "icons": {
    "16": "images/16.png",
    "32": "images/32.png",
    "48": "images/48.png",
    "64": "images/64.png",
    "128": "images/128.png"
  },
  "manifest_version": 2,
  "name": "__MSG_app_name__",
  "permissions": [
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "short_name": "YoutubeCat",
  "version": "1.2",
  "web_accessible_resources": [
    "images/500.gif"
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}