This SlackBuild used to support a variable CUSTOM_CSS that made it
possible to customize the user interface using a css file.

Now the same can be done via vivaldi://experiments/


BEFORE running SlackBuild,
download latest ffmpeg--extras from, arch:
https://archlinux.org/packages/extra/x86_64/vivaldi-ffmpeg-codecs/

then unpack:
tar --use-compress-program=unzstd -xvf /root/Downloads/vivaldi-ffmpeg-codecs-102.0.5005.49-1-x86_64.pkg.tar.zst


...then you can run the slackbuild.


tar --use-compress-program=unzstd -xvf \
/usr/src/repo/builds_15/vivaldi_BUILD/vivaldi-ffmpeg-codecs-118.0.5993.117-1-x86_64.pkg.tar.zst