Examine source code of ST Impersonator

{
  "name": "ST Impersonator",
  "version": "1.42",
  "description": "Helps support in day to day activities",
  "permissions": [
    "activeTab",
    "cookies",
    "contextualIdentities",
    "storage",
    "contextMenus",
    "tabs",
    "https://*.servicetitan.com/",
    "https://*.st.dev/"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://servicetitan.lightning.force.com/*",
        "https://servicetitan--st.lightning.force.com/*",
        "http://qwerty.com/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/st_16.png",
      "32": "images/st_32.png",
      "48": "images/st_48.png",
      "128": "images/st_128.png"
    }
  },
  "icons": {
    "16": "images/st_16.png",
    "32": "images/st_32.png",
    "48": "images/st_48.png",
    "128": "images/st_128.png"
  },
  "manifest_version": 2
}