This is a personal project that I decided to share. I wanted to be able to see the window background image more often, and voila. I hope you enjoy it, and more so I hope it inspires you to create your own customizations. If you do, please share them with the community!
In short, to enable modifications in Vivaldi and install these styles:
If you're curious how to start modding Vivaldi, check out the Vivaldi forums and this awesome post for more information.
Also, this link will allow you to open DevTools for the browser UI: vivaldi://inspect/#apps
This design was created while using Vivaldi on Windows with the Gradient theme; though all default themes and multiple custom themes have also been tested.
The initial design only accounted for the following settings:
If you find any issues with ui layouts or themes, and feel so inclined, please feel free to create an issue on the GitHub repo. Screenshots are highly encouraged!
I also made a codepen that shows off some themes just cause.