Examine source code of Extension List

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Extension List",
  "version": "1.1.0",
  "manifest_version": 2,
  "description": "Extension List",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon-19.png",
      "38": "images/icon-38.png"
    },
    "default_title": "Extension List",
    "default_popup": "./popup/index.html"
  },
  "permissions": [
    "management"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6803b85-30f8-4175-bf6e-857824e61654}"
    }
  }
}