How to enable Tab Preview in Microsoft Edge Chromium
How to enable Tab Hover Cards in new Edge
Tab Hover Cards is one of the features not enabled by default, but we can enable it on the Experiments.
Step 1, Launch Edge, and type the following command in the address bar.
Step 2, Click the drop-down menu and select Enabled
You will see 3 similar options, Enabled, Enabled B, and Enabled C. The difference is the time it takes for the card to appear after hovering the pointer over the tab, the difference is small. In my test, Enabled B >= Enabled > Enabled C.
Step 3, Relaunch Edge.
After the restart, when you the mouse pointer on the tab, it will display the page's name and a brief description.