Main idea: use multiple windows and each for a particular project. Can leave one as a catch-all.
From top right menu > More Tools > Name Window..., name each window. Use certain symbols or formats to differ manually renamed windows from page original tabs.
The name isn't directly visible but will be shown in different scenarios:
- on Mac, using Mission Control or App Exposé
- on Windows, on taskbar or switch windows using Alt-Tab
When open new tabs, consider moving them to a more proper window. Either by dragging or right click on the tab and choose Move Tab to Another Window.