Examine source code of ATC

{
  "manifest_version": 2,
  "name": "ATC",
  "version": "3.0",
  "description": "A developer tool to inspect and copy element selectors (like XPath or CSS) for testing purposes. Version 2",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "128": "icon.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "ATC - Click to capture data, right-click for Options"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "vvajithk321@gmail.com"
    }
  }
}