Weird. I was using Mosaic on DECs at the beginning of the 90s (when WWW came to university around 1993), then Netscape (commercial "fork" of Mosaic) on SGIs (at my first startup) and then Firefox on Linux.

[Edit] I still remember Coherence also [1], yes I'm that old ;-)

[1] "Cameron made a joke every 30 secs - noone laughed in the audience though I found them all funny." https://svese.dev/i-want-to-meet-cameron-purdy/