the year 1996, if you mean the web-browser named Opera.
Second reply
Musical Opera was created in Italy in the late-16th century. The first opera is generally thought to be Dafne, by Jacopo Peri. The music for this opera has been lost. The earliest opera for which we have the music and which receives occasional performances is L'Orfeo by Claudio Monteverdi, first performed in Mantua, Italy, in 1607.
Pacific Opera was created in 2003.
The Flying Opera was created in 2008.
The Threepenny Opera was created in 1928.
Germania - opera - was created in 1902.
Fantasio - opera - was created in 1872.
Transformations - opera - was created in 1973.
Gwendoline - opera - was created in 1886.
Satyagraha - opera - was created in 1980.
Chelsea Opera was created in 2004.
Aurora - opera - was created in 1908.
Fortunio - opera - was created in 1907.
Atalanta - opera - was created in 1736.