The vertical reading mode introduced by Vivaldi Browser 1.14 is one of the best ways for reading texts in Japanese, Korean, and Chinese. Next to this new feature, the update also brings customizable web panels and Markdown support for notes.
https://www.notebookcheck.net/Vivaldi-Browser-celebrates-its-third-anniversary-by-adding-vertical-reading-markdown-support-for-notes-and-more.280588.0.html