Chrome Is Testing The Ability To Customize PWA’s Title Bar On Windows
https://web.devChrome is beginning to test a Window Controls Overlay feature, which is the topic of this very article, soon lets you create similar user interfaces for your PWA.
Starting in Chrome 92, Window Controls Overlay will be available as an origin trial in Chrome. The origin trial is expected to end in Chrome 94 (expected in July 2021). To experiment with Window Controls Overlay locally, without an origin trial token, enable the #enable-desktop-pwas-window-controls-overlay
flag in chrome://flags.
Here is a demo app that you can play with in different supporting and non-supporting browsers and in the installed and non-installed state. For the actual Window Controls Overlay experience, you need to install the app and set the flag.
You can do it for the Mac as well.