docs: Add a note about previously installed server installations

Author: natorion

README.md

@@ -123,6 +123,8 @@ claude mcp add chrome-devtools --scope user npx chrome-devtools-mcp@latest
 ```
 
 **Install as a Plugin (MCP + Skills)**
+> [!NOTE]  
+> If you already had Chrome DevTools MCP installed previously for Claude Code, make sure to remove it first from your installation and configuration files.
 
 To install Chrome DevTools MCP with skills, add the marketplace registry in Claude Code: