I want 1 (one) workspace, as multiple workspaces is confusing. I currently have an "all" workspace that has all the tabs I want. But there is another workspace ("empty") lurking (with only a start page on it). How to get rid of the "empty" workspace? How to have only 1 workspace?

If multiple workspaces must exist, how to set the default workspace: the workspace that is loaded when Vivaldi starts up?

Thanks for the help.