Examine source code of DraftMirror

{
  "manifest_version": 3,
  "name": "DraftMirror",
  "version": "1.0.0",
  "description": "A private communication preflight that suggests small, meaning-preserving edits.",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "optional_host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "64": "assets/icon-64.png",
    "96": "assets/icon-96.png",
    "128": "assets/icon-128.png"
  },
  "action": {
    "default_title": "Check the current draft with DraftMirror",
    "default_icon": {
      "16": "assets/icon-16.png",
      "32": "assets/icon-32.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+M",
        "mac": "MacCtrl+Shift+M"
      },
      "description": "Check the current draft with DraftMirror"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{506D72F7-5CBB-4D83-A4B3-4C6F287C0D49}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "142.0"
    }
  }
}