What is a good browser to use?

[Wonder Why]

8. Unlike virtually all the other big name ones, Firefox is one that really strives to protect your privacy & security.

Having used browsers since the first Mozilla one came out in the early nineties and worked on an ordinary dumb VT100 terminal with no graphics, I have had a lot of experience with them in the last 30+ years. Market share is due to the pressure and $$ Google and Microsoft put on other companies since they own the two most widespread operating systems, Android and Windows. You can't get away with not having them even if you don't use them so they become the default so most people don't make the effort to look for anything better for them.