Opera is a web browser for Windows, macOS, and Linux operating systems developed by Opera Software. It uses the Blink layout engine. An earlier version using the Presto layout engine is still available, and runs on FreeBSD systems.
Opera was conceived at Telenor as a research project in 1994 and was bought by Opera Software in 1995. Initially a commercial web browser, Opera later became freeware in 2005. Until 2013, Opera used the Presto layout engine. These versions of Opera have received 13 different awards. In 2013, however, Opera changed its layout engine to Blink, the layout engine of its competitor Chromium. These new versions were criticized for missing popular UI elements and the layout engine change.
In 2016, Opera Software AS was sold to a Chinese consortium. The parent company, the similarly named Opera Software ASA, changed its name to Otello Corporation.
Features of the Opera web browser include private browsing, tabbed browsing, download manager, mouse gestures and browser extensions.