Version 5
Opera 5, released on December 6, 2000, was the first version which was ad-sponsored instead of having a trial period. Version 5 also supported ICQ, but this was dropped from later versions.
Opera supported OS/2 for the first time, requiring WarpIN and Odin to be installed.
Opera 5.10 (April 2001) was the first version to recognize mouse gestures, but this feature was disabled by default.
Read more about this topic: History Of The Opera Web Browser
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“Remember that you were a slave in the land of Egypt, and the LORD your God brought you out from there with a mighty hand and an outstretched arm; therefore the LORD your God commanded you to keep the sabbath day.”
—Bible: Hebrew, Deuteronomy 5:15.
See Exodus 22:8 for a different version of this fourth commandment.