Examine source code of Auto Website Blocker

{
  "manifest_version": 2,
  "name": "Auto Website Blocker",
  "description": "A website extension, whcih lets you block websites automatically, based on time.",
  "version": "1.0",
  "icons": {
    "48": "icon.png"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup/index.html"
  },
  "permissions": [
    "webRequest",
    "<all_urls>",
    "webRequestBlocking",
    "storage",
    "notifications",
    "tabs",
    "activeTab"
  ]
}