Examine source code of Endpoint Extractor

{
  "manifest_version": 2,
  "name": "Endpoint Extractor",
  "version": "1.0",
  "description": "Extracts all endpoints from the current page and its loaded scripts.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon12.png",
      "48": "icons/icon64.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon12.png",
    "48": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{af7b6e96-2dac-4d60-ab46-3ef38f7dd906}"
    }
  }
}