Browser memory problem with webcam stream

I have a problem with memory on my windows 7 PC. However, when viewing the webcam streams. I have adjusted the settings in the octopi.txt today since we can no longer open the website in Firefox 70.0.1 (64-bit). There is no picture and the storage requirements are constantly increasing.
In the VLC the stream runs without problems. Any ideas what I did wrong?
my current settings:
camera_raspi_options="-x 1280 -y 720 -fps 20"
camera_usb_options="-r 1280x720 -fps 20"

I had previously set "camera = auto", but saw very strong jpg artifacts in the picture. I have a Picam 1.3 connected. Before, it was about 7mbit stream displayed in the VLC, now it is about 80mbit. The picture quality has become much better, but in the browser is no longer display. The whole octoprint page freezes for minutes.
Is the bitrate too high for the ad in Firefox?

octopi Version 1.3.12 runs on a pi 4

A note: with Chrome on my mobile there are no problems.

Yeah there are some issues with the latest firefox

try this workaround on my firefox 70.0.1 is already set to false

Well that was the only idea I had
Maybe somebody else knows more :smiley: