Chrome was faster than Firefox and Internet explorer. And rarely took the whole pc down after a crash unlike the other 2 so people moved of them to Chrome unless something like that happens where some major websites become completely unusable on Chrome few people are going to move of it now. And as Google owns many of the most used websites on the web that is unlikely to happen now. People complain about Google a lot but majority of the web tech has improved because of Google research directly or indirectly being open sourced