I highly suspect your chrome browser is taking up excessive amounts of ram. Safari is excellent in managing this.
You should give safari another try. It should be as fast, if not faster than chrome. Safari is heavily optimised for mac and you're going to find your CPU temps to be more manageable. The only downside so far is that you can't watch youtube videos in 4K. But other than that, Safari should be a pleasant experience.
Like someone else said, Microsoft Edge is a great alternative if you're used to the chrome experience.