microsoft / microsoft/vscode-js-debug
Unable to launch browser: "Unable to attach to browser"
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- TypeScript
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Description
Type: Bug
- Open VS code in windows
- Go to run and debug (ctrl + shift + alt + f5)
- Run any configuration type
chrome, requestlaunch - Error is shown: Unable to launch browser: "Unable to attach to browser"
I'll attach the log files upon request
Note: A month ago, the same config will launch without problem.
Extension version: 2025.7.1117
VS Code version: Code - Insiders 1.103.0-insider (cd20192782347e3afdbabc65ddaab56acd56da58, 2025-07-14T04:17:08.264Z)
OS version: Windows_NT x64 10.0.26100
Modes:
System Info
| Item | Value |
|---|---|
| CPUs | Intel(R) Core(TM) i7-10870H CPU @ 2.20GHz (16 x 2208) |
| GPU Status | 2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off |
| Load (avg) | undefined |
| Memory (System) | 31.84GB (9.30GB free) |
| Process Argv | --crash-reporter-id 9149b6ee-57b9-4371-a736-e516733f3a40 |
| Screen Reader | no |
| VM | 0% |
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Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the reported Windows failure in VS Code Insiders with a Chrome launch configuration, using extension version 2025.7.1117. Request the missing log files if reproduction succeeds; done means the configuration launches the browser without the “Unable to attach to browser” error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript, vscode
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100