Examine source code of Request Delayer

{
  "manifest_version": 2,
  "name": "Request Delayer",
  "version": "1.0",
  "description": "Delays specific requests based on regex rules.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    },
    "default_title": "Request Delayer"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{80bf7ac3-947e-4275-a43c-00ef49f71a87}"
    }
  }
}