Vivaldi Massive Customization
Massive customization: Vivaldi gives loads of customization features that let you modify the looks of your browser. You can switch the browser tabs either at the bottom or side of the window. You can add a link to your interest based category be it bookmark or speed dial directly from the address bar. There are several keyboard shortcuts for you to customize functions of the browser.
Vivaldi Chameleon effect
Chameleon effect: While Vivaldi has tonnes of customization features, it also focuses on aesthetics. The interface is sleek, simple and easy to navigate. One of the cool features is the chameleon effect which changes color of the UI depending on the website you visit. For an example, Facebook will turn the color blue, while Gmail will turn red.