Error: Browser is already in use for C:\Users\1\AppData\Local\ms-playwright\mcp-chrome-profile, use --isolated to run multiple instances of the same browser

[578691200]

This problem has been bothering me for a long time. Where should this --isolated be configured? Because every time the AI calls playwright MCP, it always prompts a browser instance conflict problem. How should this problem be solved? Otherwise, this MCP cannot be used normally. How can this problem be completely solved?

[pavelfeldman]

Do you use http or npx config for Playwright MCP?

[578691200]

@pavelfeldman The official configuration of augment is used. Clicking the button to install directly uses npx by default.

[pavelfeldman]

It means you have more than one client using the same settings, hence using the same profile...

[578691200]

It means you have more than one client using the same settings, hence using the same profile...

How to solve this problem? I have tried closing all Chrome browsers, but it still doesn't work. Is there a solution? I've seen many people encounter the same problem as me.

[Colton-wq]

Only browser processes can be killed

[578691200]

Only browser processes can be killed

As I pointed out in the question above, I terminated all Chrome browser processes, but this did not solve my problem. @cy14700

[jbarnell1]

I'm having the same issues.

[yys190]

The latest version of playwright/mcp does have this problem. Switching to the previous version is normal
npx -y @playwright/mcp@v0.0.31

[Colton-wq]

只能杀死浏览器进程

正如我在上面的问题中指出的那样，我终止了所有 Chrome 浏览器进程，但这并没有解决我的问题。

Well, you need to terminate it in the resource manager. You can tell AI to kill the process for you.

[578691200]

只能杀死浏览器进程

正如我在上面的问题中指出的那样，我终止了所有 Chrome 浏览器进程，但这并没有解决我的问题。

Well, you need to terminate it in the resource manager. You can tell AI to kill the process for you.

@cy14700 Asking AI to help me end the process didn't work at all. I've already tried it, but it still prompts a browser instance conflict.

[578691200]

The latest version of playwright/mcp does have this problem. Switching to the previous version is normal npx -y @playwright/mcp@v0.0.31
@yys190
Indeed, after installing version 0.0.31, the issue of browser instance conflict no longer exists. It seems that there is a problem with the latest version of Playwright MCP, and we hope that this issue can be fixed and updated as soon as possible.

[anuragasawa20]

Yeah, Even I tried out into my cloud droplet giving the same issue, tried out every possible solution but still error persists. "Error: Browser is already in use for /root/.cache/ms-playwright/mcp-chrome-profile, use --isolated to run multiple instances of the same browser"

[robertjmason]

Claude actually figured out how to get past it when I started running into it:

[jbarnell1]

npx -y @playwright/mcp@v0.0.31

^^ this command is not working for me in bash (admin, win11),

Also, manually installing @v0.0.31 is not working: