I'm running into this issue as well, but couldn't see anything that jumped out when running with log at debug. Happy to help troubleshoot, but could use some help getting pointed in the right direction. Chrome/Edge work-out-of-the-box, but like layday mentioned, Firefox doesn't appear to be sending Webpack URLs at all for the vscode debugger to map.

[abz041]

I'm running into this issue as well, but couldn't see anything that jumped out when running with log at debug. Happy to help troubleshoot, but could use some help getting pointed in the right direction. Chrome/Edge work-out-of-the-box, but like layday mentioned, Firefox doesn't appear to be sending Webpack URLs at all for the vscode debugger to map.

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "firefox",
            "request": "launch",
            "reAttach": true,
            "name": "Launch localhost",
            "url": "http://localhost/index.html",
            "webRoot": "${workspaceFolder}"
        },
        {
            "type": "pwa-chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "url": "http://localhost:8080",
            "webRoot": "${workspaceFolder}"
        }
    ]
}

Originally posted by @MetricMike in https://github.com/firefox-devtools/vscode-firefox-debug/issues/271#issuecomment-1014777276

[abz041]

[nchevobbe]

this looks invalid, you created this issue from a comment on another issue, so I'm not sure what was the goal.