Firefox ESR not using client certificate during fetch request

Client
1

Hi,

we are building an application on top of the A12 BAP-Client. During startup the BAP-Client loads some ui models as JSON using a fetch request from a server that insists on a client certificate. The problem is Firefox 60.9.0esr seems to ignore the client certificate, that was just selected in the prompt during loading of the application.

I’m getting a 403 response indicating that the client certificate is missing.

Firefox 68.0.2 (64-Bit), Chrome 76.0.3809.132 and Microsoft Edge 42.17134.1.0 all work just fine. I also tried to send the same request using Postman and it also works.

Unfortunately some of our customers use the Firefox ESR, so I’m trying to make it work.

Does somebody have a clue why this is failing in Firefox ESR and if this problem could be connected with the BAP-Client implementation?

Thanks in advance,
Rolf

2

To support fetch calls before Firefox version 61.0b13, you need to overload the fetch function in your code:

window.fetch = fetchWrapper(url, data) {
  return fetch(url, {...data, credentials: 'same-origin' });
}

In modern browser, same-origin is set by default.