Closed Bug 1673621 Opened 4 years ago Closed 4 years ago

Websocket re-sending old data beginning with Firefox 82

Categories

(Firefox :: Untriaged, defect)

Product:
Firefox
Component:
Untriaged
Version:
Firefox 82
Type:
defect

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1673340

People

(Reporter: thomas.schreiber, Unassigned)

Details

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:82.0) Gecko/20100101 Firefox/82.0

Steps to reproduce:

Beginning with Firefox 82, if multiple larger arraybuffers are sent via a WebSocket connection in a short interval, Firefox re-sends a previous arraybuffer instead of the actually selected ArrayBuffer.

This issue is newly introduced in Firefox 82, in Firefox 81 no such behaviour was listed. It seems to appear when more than 512KB are sent back-to-back. This issue is not debuggable via the DevTools (which log the data that should have been sent) but only visible in Wireshark.

This bug breaks various european speed tests run by national telecom operators that are based on https://github.com/rtr-nettest/rmbtws/

I've written more details of this bug on GitHub here: https://github.com/rtr-nettest/rmbtws/issues/15

A short demo demonstrating the bug can be found here: https://github.com/rtr-nettest/rmbtws/tree/firefox82-reproduce (run /test/Websockettest.html)

Actual results:

An old ArrayBuffer that was sent via socket.sent is sent multiple teimes

Expected results:

The actual ArrayBuffers that were sent via socket.send should be transmitted over the network.

Seems to be a duplicate of Bug 1673340 and Bug 1673467

Status: UNCONFIRMED → RESOLVED
Closed: 4 years ago
Resolution: --- → DUPLICATE
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