Co-creator of Opera web browser with Jon Stephenson von Tetzchner. The two were employed by Telenor, a Norwegian telecommunications company, where they developed Opera browser (originally known as MultiTorg Opera)
After a long battle with cancer, Ivarsøy died at the young age of 48. Since version 9, the “About” page in Opera web browser carries the statement – “In memory of Geir Ivarsøy”.