Earlier quoted context omitted.
Well, actually, there was only a short time, when more than one had been widely used. Something like Mosaic - Netscape - IE - Mozilla/Firefox/The Browser Now Known As Vivaldi/... - Chrome
I seem to remember Netscape and IE having had similar market shares for a while at that time (the infamous first browser war), but my memories might be distorted to be honest.
Here's hoping for another one, just to keep them on their toes.