The first popular web browser was Mosaic.
Mosaic’s first beta was released for Unix operating systems running X Window on January 23, 1993. It wasn’t the first graphical web browser. That honor goes to ViolaWWW, although some argue the even more obscure Erwise should get the credit for being the first web browser.
I remember using Mosaic in 1993 at the same university where Erwise was created and I was studying (Helsinki University of Technology that time, now Aalto University). That lead quicly to my own web pages that developed over the years to create ePanorama.net.