Brave is a free and open-source web browser developed by Brave Software, Inc. based on the Chromium web browser. The browser blocks ads and website trackers.
Brave used to provide a comfortable solution for seeing a tab without switching to it by displaying a full preview of the loaded site on the tab you hovered the mouse cursor over.
A message on Twitter on February 19, 2019 confirms that Brave had to remove the feature due to closer adoption of ‘Chromium‘