/etc/1password/custom_allowed_browsers and putting vivaldi-bin into the file. This has not worked for me yet in Bazzite. Both 1Password and Vivaldi are installed with layering, so they should be able to communicate properly, as there's no sandboxing. Can anyone help me understand what's going on?
tar method again, and asked that I completely uninstall the old installation. This included deleting the contents of /opt/1Password. While this didn't work, it did make me realize that the .rpm version of the installation expected /opt/1Password to not already exist, and so there were installation problems.