Examine source code of Base64 Image Converter

{
  "manifest_version": 3,
  "name": "Base64 Image Converter",
  "version": "1.2.0",
  "description": "Convert images to Base64 strings and Base64 to images with a professional interface.",
  "permissions": [
    "tabs",
    "clipboardWrite"
  ],
  "permissions_description": {
    "tabs": "Required to open the extension interface in a new tab for a better user experience.",
    "clipboardWrite": "Required to copy Base64 strings to the clipboard for user convenience."
  },
  "action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "popup.html",
        "popup.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "base64imageconverter@myextension.com"
    }
  }
}