Examine source code of YouTime Tracker

{
  "manifest_version": 2,
  "name": "YouTime Tracker",
  "version": "0.1",
  "description": "Hides suggested videos on YouTube as well as tracks time spent on YouTube.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "webNavigation",
    "tabs",
    "storage",
    "notifications"
  ],
  "browser_action": {
    "default_title": "YouTime Tracker",
    "default_popup": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "hide.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}