Opera is a web browser for Windows, macOS, and Linux operating systems. It is developed by Opera Software. As of November 2016, the browser is owned by a Chinese group of investors under the name Golden Brick Capital Private Equity Fund I Limited Partnership. It is also available as Opera Mobile, Opera Mini and Opera Coast – on devices running Android, iOS, Windows Phone, Symbian, Maemo, Bada, BlackBerry and Windows Mobile operating systems, and as Opera Mini on Java ME-capable devices. It uses the Blink layout engine. An earlier version using the Presto layout engine is still available, and runs on FreeBSD systems. According to Opera Software, the browser had more than 350 million users worldwide in the 4th quarter of 2014. Total Opera mobile users reached 291 million in June 2015. According to SlashGeek, Opera has originated features later adopted by other web browsers, including Speed Dial, pop-up blocking, browser sessions, private browsing, and tabbed browsing.