I am getting a 499 error on a particular api call (specifically only when the browser is Firefox). My research has shown the 499 error is caused by the client severing the connection with the api.

However, in my application my backend is making a series of external api requests and it seems like this is where the 499 error is coming from. In this instance does it make sense that my backend is acting as the client and causing the 499 error since it is making api calls?

Lastly if this is the case why would the browser have anything to do with this?