Examine source code of Forensic Screenshot

{
  "manifest_version": 2,
  "name": "Forensic Screenshot",
  "version": "1.0",
  "description": "Captures a forensic screenshot and metadata report of the active browser tab. All processing is local. No data collection.",
  "browser_specific_settings": {
    "gecko": {
      "id": "forensic_screenshot@libor_benes.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_title": "Forensic Screenshot",
    "default_panel": "sidebar.html"
  },
  "permissions": [
    "activeTab",
    "downloads",
    "tabs",
    "<all_urls>"
  ]
}