Examine source code of Ensighten Developer Tools

{
  "applications": {
    "gecko": {
      "strict_min_version": "55.0"
    }
  },
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_title": "Ensighten Developer Tools",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/js/worker.js"
      ],
      "run_at": "document_end"
    }
  ],
  "user_scripts": {},
  "icons": {
    "16": "images/off.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "page_action": {
    "default_icon": {
      "16": "images/off.png",
      "48": "images/icon-48.png",
      "128": "images/icon-128.png"
    },
    "default_title": "Ensighten Developer Tools",
    "default_popup": "popup.html"
  },
  "description": "Ensighten Utilities",
  "manifest_version": 2,
  "name": "Ensighten Developer Tools",
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "*://*/",
    "tabs",
    "activeTab",
    "*://*.ensighten.com/*",
    "webNavigation",
    "contextMenus",
    "idle",
    "alarms",
    "cookies"
  ],
  "version": "5.0",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "/js/workerHelper.js"
  ]
}