Examine source code of NetShadow Interceptor

{
  "manifest_version": 2,
  "name": "NetShadow Interceptor",
  "version": "1.0",
  "description": "Intercept, modify and repeat web requests with a hacker-style interface",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "NetShadow Interceptor",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e9de56b-cac8-4ecd-9ada-1528ced7252b}"
    }
  }
}