Hi, We are an Enterprise Web-App Team and are troubleshooting a rare issue with Firefox on Some Laptops. The Action: We have an export to PDF functionality, where we send a big HTML payload to our Server which is backed by NGINX as a reverse proxy. It's a POST request with payload usually in MBs. The Issue: This POST request fails with `ns_error_abort` on Firefox Browser(107.0.1), running on Win 11 (21H2). We have observed this issue on Several Machines, but strangely enough it's intermittent and varies with Machines. It also works correctly for Lower Payload sizes till 150KB, but hangs up intermittently. Once it's in a suspended state, all subsequent XHR calls from the Web-App are also not processed. NGINX Logs: This POST request failure materializes in 2 forms: 1. Quick Termination. We fire-off the request, and it fails in 2-3 seconds. There's `ns_error_abort`, on NGINX this reflects as status '''499'''. Also, the payload bytes received on NGINX is different. 2. Timeout. The request timed-out after 400s. On NGINX this shows up at status '''408'''. We are performing RCA on this. Here's what we have discovered so far: 1. This error occurs on Selective machines for Firefox version greater than 99. The HTTP request generated works correctly when fired from cURL, Postman, and other browsers on same machine. The request crashed for all Firefox versions greater than 100. 2. This issue only occurs with NGINX. When we tried this with a Node proxy or Static server, this issue didn't occur. 3. The request fails intermittently between Quick Termination and Timeout. Once it starts hitting Timeout, all XHR calls from Web-App start failing. 4. We also have a HTTP2 SSE Connection, which terminates as NS_BINDING_ABORT We are pretty much on our knowledge limit troubleshooting this issue. Please assist us in troubleshooting this. Thank You