Which browser was launched by Vivaldi Technologies on January 27, 2015? Vivaldi. Vivaldi Technologies introduced the browser’s first technical preview on January 27, 2015. The company was founded by Jon Stephenson von Tetzchner, a former Opera chief executive, and Tatsuki Tomita.
The project grew partly from dissatisfaction among former Opera users after Opera moved away from its distinctive Presto-based browser design. Vivaldi aimed to restore power-user features such as extensive tab controls, customization, keyboard commands, and built-in tools. Its interface is proprietary, while its underlying browser technology is based on Chromium.
The date refers to the initial technical preview, not the first fully mature release. That distinction explains why some timelines describe Vivaldi as “initially released” in 2015 while later versions mark important milestones. Waterfox, Otter Browser, and Brave are separate projects with different origins and release histories.