Opera on Linux does not have support for System Title Bars and Borders, nor does it provide support for the KDE Plasma Universal Menu Bar. I love Opera's features, but I believe the UI could be a little more configurable...
Posts made by amatsuki555
RE: General Suggestions and Requests Topic - Opera for DesktopsSuggestions and feature requests
RE: Add Google Hangouts to the SidebarSuggestions and feature requests
@not-you I believe that they did make those plans, but all they have done is moved the call feature around, and now it is Google Meet.