Not stopping at Breakpoints

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

Start with the “Launch Scheduler” Firefox configuration, including its URL, webRoot, and static path mapping, and reproduce the page load at /routing/schedule. Check whether the configured JavaScript breakpoints are reached; done means the debugger stops at those breakpoints or the issue identifies the missing configuration or reproducible cause.

Written by the indexing model from the issue text.