Python 3.14 webbrowser regression when launching vscode:// URI on macOS
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- Python
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Description
Bug report
Bug description:
In Python 3.13.13 on macOS 26.3.1, I run __import__("webbrowser").open("vscode://"): it opens Microsoft VS Code
Same machine, in Python 3.14.2, same code: opens Chrome instead
I observe the same behaviour with Python 3.15.0a8
One line test case (using uv):
uv run --no-project --python=3.14 python3 -c '__import__("webbrowser").open("vscode://")'
In my actual use case, the URI is more complex, something like vscode://vscode-remote/ssh-remote+MYDEVBOX.example.com/workspaces/MYPROJECT.code-workspace – but vscode:// is enough to reproduce it
CPython versions tested on:
3.14
Operating systems tested on:
macOS
Linked PRs
- gh-155859
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 with the webbrowser.open() entry point and reproduce the issue using the provided uv command on macOS with Python 3.14. Compare its behavior with Python 3.13 for the vscode:// URI; done means the URI launches VS Code rather than Chrome.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- macos, python
- Domain
- desktop-dev
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 25/100