Examine source code of QuickCopyPlainText

{
  "manifest_version": 2,
  "name": "QuickCopyPlainText",
  "version": "1.0",
  "description": "Copy all visible text without formatting",
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b863ad5-1180-4534-9335-f348f2830485}",
      "strict_min_version": "105.0"
    }
  },
  "permissions": [
    "activeTab",
    "clipboardWrite"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "64": "icon64.png"
    }
  }
}