Ok, that makes sense, so let me recap it.
I have installed
root@alef14:/# apt show libwebpmux3/focal
Package: libwebpmux3
Version: 0.6.1-2
as you said, while I should have something more like
libwebpmux-3-0.6.1-2ubuntu0.20.04.1
Plus, again as you said, I use a different architecture (which I wasn’t aware before), this is
root@alef14:/# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
instead of
amd64
It’s because I run Ubuntu as Linux Compatibility Layer on FreeBSD, see
This apparently makes difference.
I didn’t mention that earlier, because you can install Brave/Vivaldi browser or LBRY-Desktop app. as it’s regular Ubuntu (which I did).
The most important thing is we found the reason (thanks to @Firenze @bandali ).
I’ll update the title to reflect all the findings.
Thanks again!
UPDATE:
I can’t update the thread title.