[SOLVED] Proxmox 6.4 update - Weird input behavior and console artifacts in Firefox 88


Well-Known Member
Aug 4, 2017
Good evening,

I just installed two Proxmox instances (6.3 and 6.4) and updated the 6.3 to 6.4-4 immediately. Both show weird console artifacts in FF 88.


In Chromium-based browsers, everything seems to be normal. Does anyone know anything about this issue and is there workaround via settings etc in FF?

Also, CTRL/SHIFT-keys do not work in Firefox 88 in the console of the host or in a VM console.
Last edited:
I just tested it on the Firefox 88.0 (64-bit), it works, Can you please test it on the Firefox private window or disable the extensions?
HI @Moayad ,

thanks for the quick reply. I have the same issue with and without addons activated in FF 88. Also checked in Private mode. Systems tested:

Windows10 v1909
Windows Server 2019 Standard v1809
Gentoo & Funtoo
Arch Linux
Debian (Testing).

you have to allow the site to 'extract canvas data' for this to work
with my firefox it looks like this: canvas-allow.png
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