Added option to delay recording the results the test at a user's suggestion.
Added "720p H264 WebRTC stream" simulation preset at a user's suggestions, and increased the maximum frequency accordingly, although it's really intense, so I can't get it to come close to passing on anything I own.
Fixed bug stopping presets from updating the frequency.
Fixed arrow icons not working on devices other than Windows after user report.
Fixed bug where connections would always close after ten seconds thanks to user report.
Apparently I had a 10 second timeout on the WebSocket connection. I assumed sending all the packets would count as transmissions to keep it alive, but uh...apparently that was not the case. So yeah, apparently it would just always close after ten seconds. Kind of embarrassing for me to just notice now, but it's fixed now by having the client send one empty WebSocket message every 5 seconds.
Made progress circle thingies and the big text in them actually be responsive on small screens instead of always just being humongous at multiple users' suggestions.