SUID sandbox helper binary was found, but is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure that /home/matoken/opt/vivaldi/opt/vivaldi/vivaldi-sandbox is owned by root and has mode 4755. Aborted[This script will find the latest Vivaldi binary package, download it and repackage it into Slackware format.](https://gist.github.com/ruario/dcbba70da900dac68fcc883542ff7ace "This script will find the latest Vivaldi binary package, download it and repackage it into Slackware format.") $ chmod 4755 ~/opt/vivaldi/opt/vivaldi/vivaldi-sandbox $ sudo chown root.root ~/opt/vivaldi/opt/vivaldi/vivaldi-sandbox $ ~/opt/vivaldi/opt/vivaldi/vivaldi --no-sandbox