Examine source code of Publisher Tag Debugger

{
  "manifest_version": 2,
  "name": "Publisher Tag Debugger",
  "description": "Publisher Tag Debugger Extension",
  "version": "0.0.1",
  "short_name": "Publisher Tag Debugger",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "scripting",
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "support@analytics-debugger.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Publisher Tag Debugger"
  }
}