Extension doesn't work in web extension host on Codespaces or github.dev

[thegecko]

Due to the file schemes used in GitHub Codespaces and github.dev, browser-based debugging using an extension running in the web extension host doesn't work. If I remember correctly, it did work ~6 Months ago, but have no evidence.

I've raised this as an issue on codespaces and VSCode here:

https://github.com/orgs/community/discussions/44904
microsoft/vscode#171991

However, it isn't clear to me if this is an issue with VS Code, codespaces or the adapter support.

As Mock Debug is used as a template/example for debuggers, especially browser-based debuggers, I'd really appreciate support/guidance as to how we can get this working.

[thegecko]

I'm very keen to get an update on this or at least to confirm if the issue is with the adapter (there may be a certain path format to use), VS Code or codespaces.

To that end, I've created instructions and a demo example extension to recreate the issue here:

https://github.com/thegecko/vscode-web-test