Firefox doesn't give me a stack trace on response details when using the Network Monitor tool

Hi everyone

On some websites I get the stack trace, on some I don’t. The documentation tells me it shows the stack trace ‘when it’s available’, but I am not quite sure what that means. Both website instances do an XHR request, triggered via JavaScript. It’s unclear to me what is required, such that Firefox Network Monitor shows me the stack trace. What am I missing?

I am running Firefox 132.0.2 (64-bit) on Arch Linux. I have the ublock extension installed.

Hello linochs,

It’s hard to say without having access to the page itself, are you able to share it?
If not, some kind of reduced test case would help us investigate the issue you’re facing.
Thanks!

Hi Nicolas

Thanks for your response. Unfortunately, the page is only available from a VPN, so I am not able to share. I was just curious, if Firefox is not able to track the request origin / stack trace in some scenarios. For instance, the website is using a self-signed certificate, that is only available on my host and therefore not recognized from Firefox as ‘globally available’. I was curious if that causes some security based issues, that would prevent Firefox from tracking the request too deeply.

I could however try to emulate and send a reproducible example here.