Desktop web browser known for introduction of innovative features that were ultimately adopted into other web browsers.
Opera (web browser)
Opera is a multi-platform web browser developed by the Opera company of the same name. It differs from other browsers in its user interface and other features.
Opera was originally released on April 10, 1995, making it one of the oldest desktop web browsers still in active development today. It was commercial software for the first ten years and had its own proprietary Presto layout engine. Opera switched from Presto to Chromium in 2013.