Examine source code of Text Copier

{
  "manifest_version": 2,
  "name": "Text Copier",
  "version": "1.2",
  "description": "Copy text from elements with keyboard shortcuts and hover functionality",
  "permissions": [
    "clipboardWrite",
    "notifications",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js",
        "popup/popup.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d8f4736-7479-432c-97fd-3b85370b599f}"
    }
  }
}