IIRC, Viola also got scooped by Mosaic, which was the first browser most people used, before you could buy one shrinkwrapped at a store.

https://en.wikipedia.org/wiki/ViolaWWW

There was also OmniWeb on the Next machine, but there weren't a lot of NeXT machines around.

Mosaic was the first browser to support images because HTML didn't support images and Marc Andreesen and Eric Bina sat in a coffee shop on campus while Marc talked himself into going rogue and making his own tag while Eric didn't talk him out of it (source, Eric Bina, ACM lecture at UIUC ca 1995)