Examine source code of Ignore X-Frame-Optionsa

{
  "manifest_version": 2,
  "name": "Ignore X-Frame-Options",
  "version": "1.6.9",
  "description": "Allows all sites to be loaded in iframes, despite X-Frame-Options header settings.",
  "homepage_url": "https://github.com/ThomazPom/Moz-Ext-Ignore-X-Frame-Options",
  "icons": {
    "38": "icons/38.png",
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png",
    "626": "icons/logo.png"
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "webNavigation"
  ],
  "browser_action": {
    "default_icon": "icons/38.png",
    "default_title": "X-Frame-Options are ignored",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1828bcf4-a9bb-49a0-aa75-ed48ceb142f3}"
    }
  }
}