How to See Which Browser Extensions are slowing Google Chrome


chrome-task-manager

Google Chrome is a multi-process browser and many browser extensions run as their own process. This means that you can use Chrome’s integrated Task Manager to view the memory consumption and even current CPU usage of your running browser extensions. The Task manager will also display the resources used by your installed Chrome web apps as well as each open browser tab and other background processes.
To open the Task Manager, click Chrome’s menu button, point to Tools, and select Task Manager. You can also press Ctrl + Escape to quickly open the task manager.
The Task Manager will give you an idea of how heavy each extension is. Bear in mind that only extensions that run in the background are listed here, so extensions that inject code into pages you load may not appear in the list, although they may have an impact on page loading times.