Examine source code of Qualys' security Check

{
  "manifest_version": 2,
  "name": "Qualys BrowserCheck",
  "version": "1.0",
  "description": "Run a local browser check using Qualys' security headers and plugin inspection.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs"
  ],
  "browser_action": {
    "default_title": "Qualys BrowserCheck",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6dce0583-b36f-4b46-85ea-d47a11607f65}"
    }
  }
}