Wasn't IE killed off last year? I'm sure it's technically possible to still use it but you probably have to actively find & download it (assuming it works on updated W10)
I've used FF as main about 15 years now, I did have chrome as backup but uninstalled a couple of weeks back, so Edge is now my backup (though only because MS make it a nightmare to remove it stop it from reinstalling on the next update)
I did try Opera back when they used their own engine, the program was pretty good, with quite a few features baked in that I then emulated with Firefox plug-ins (some of which became defunct a few years back when they changed to "extensions" unfortunately, but I still have a speed-dial) being a mostly ignored browser though it was fairly often I came across pages not loading as intended. I might look into it again though.