Google Chrome has developed a working implementation of the Tab Hover Cards feature in Chrome 75. Small boxes that appear when you hover over a browser tab that display a small preview image of the associated web page. This allows you to quickly see what is open in a tab and find the particular one you are looking for. This feature has been available in Microsoft Edge for quite some time, but as we reported in February, Google has started developing this feature for the Chrome browser. In Chrome 75 this feature is functional enough that you can begin using it.
Source: https://www.bleepingcomputer.com/news/software/google-chrome-75-has-a-working-tab-hover-card-feature/