Tested with a clean angular project (ng new my-app) and with a html + jquery file.
Installed both firefox and chrome debugger extensions in vscode.
I also have two launch configurations for vscode, one for chrome and firefox.
Here’s a screen shot of chrome. You can see that in the developer tools the line is highlighted.
The same breakpoint when viewed in firefox. There is no line highlight.
Is the issue with firefox, can it identify the line from an external ide?
Or with the vscode plugin, is it sending the breakpoint line to firefox so it can appear in the browser debugger pane.