Not stopping at Breakpoints

[Riprock]

Hello team,
I am trying to debug javascript inside a django application. I have breakpoints set within the JS yet for some reason when I load the page its not triggering the debugger. Is this just not possible?

Here is my Launch

            "name": "Launch Scheduler",
            "type": "firefox",
            "request": "launch",
            "reAttach": true,
            "url": "http://localhost:8000/routing/schedule",
            "webRoot": "${workspaceFolder}",
            "pathMappings": [
                {
                    "url": "http://localhost:8000/static",
                    "path": "${workspaceFolder}/mainapp/static"
                }
            ]
        },```

Any help is greatly appreciated