Why is it not in Discover? It is an option in Ubuntu. It seems that the only way I can get it is in a tarball. On moral principle, I use anything Google as little as possible, but Vivaldi is a version of Chromium, designed in Sweden by the former owners of Opera, devoted to more privacy and less commerce.
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Not difficult. See How to install Vivaldi Browser on Ubuntu 18.04 Bionic Beaver LinuxWindows no longer obstructs my view.
Using Kubuntu Linux since March 23, 2007.
"It is a capital mistake to theorize before one has data." - Sherlock Holmes
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