Browser Tools fail to be called by Agent

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Browser tools not working, agent cannot connect to them - the dev tools show this error

ERR MCP tool execution error: Error: No server found with tool: browser_navigate: Error: MCP tool execution error: Error: No server found with tool: browser_navigate

Steps to Reproduce

Enter a prompt asking it to use the browser to navigate somewhere (select the built in browser as the target) - once acknowledged, it will ask to call the tool and then promptly fails.

Expected Behavior

It shouldn’t fail the call and should navigate to the requested address

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.43
VSCode Version: 1.99.3
Commit: 8e4da76ad196925accaa169efcae28c45454cce0
Date: 2025-10-30T18:49:27.589Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Yea, the internal browser has not been working very well at all. Even when it was able to browse, it said it cannot recognize Blazor elements on the page. The older version that was using normal browser was working super well.

3

Thanks for reporting this! This is a known issue with the new Browser Tab feature in Cursor 2.0 - the team is actively working on improvements and has shipped several fixes in recent updates.

Could you please share Request ID from the failed Agent interaction (context menu > Copy Request ID)

@Serp - Thanks for confirming the issue. Could you also share request ID if you’re seeing the same error?

1 Like
4

Today there is new kind problem. I did ask agent to see my page in location X.

  • With external browser it freezes to first “Planning next moves”.
  • With internal browser it first navigates to the page and then takes screenshot, and then freeze to the “Planning next moves”
5

Still getting lots of Failed to execute browser_navigate 8fceb0c5-6e60-462d-b310-3e955b7d7f12

6

cursor agent tab as well as cursor agent completely uanble to utilize the built in browser at all 6455308b-864c-4c32-a985-0d9ed11c3e66

7

Can confirm, this is happening for me across multiple models despite it being able to 1. See the tools, and 2. Browser Automation is green.

8

Request ID: 3334f2c4-d73d-4c05-88ea-4e616837a340