Time to Take a Break?

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Time to Take a Break?",
  "description": "A reminder to take a quick break between Youtube videos and Netflix episodes",
  "version": "0.1",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://m.youtube.com/*",
        "https://www.m.youtube.com/*",
        "https://www.youtube.com/*",
        "https://youtube.com/*"
      ],
      "js": [
        "jquery-2.2.4.min.js",
        "content.js"
      ],
      "css": [
        "take_a_break_style.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon.png"
  }
}