The most important thing for us is being able to reproduce the problem on our machines, so please attach simple steps to reproduce (STRs) and a simple test case we can use. Thank you!
Hei honza, thanks for replying. Before I file the bug one more question.
I hit this issue regularly with this service. And files stop uploading completely even if the development tools are not active. So the issue doesn’t feel like coming from the DevTools.
What is the best way for me to find more information about what is going on under the hood? Should I use a network analyzer like wireshark or similar? Does Firefox have some tools, maybe in the developer version, that would allow me to find more information about the interaction between the browser and the site?