Examine source code of Video Chat Enhancers

{
  "manifest_version": 2,
  "name": "Video Chat Enhancer",
  "version": "1.0",
  "description": "Enhance your video chat experience by displaying the IP address and location of the person you're chatting with.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f4d2e9a-62e3-4f1b-97cc-401a7716458b}"
    }
  }
}