Have you ever accidentally swiped left or right on your trackpad and found that it takes you back or forward in your Chrome browsing history?
Its annoying and too easy to do. You could lose vital data if for example you are filling out a form. Its happened to me in the past!
On mac its not in the Chrome options that you need to be looking to fix this, instead – go to System Preferences > trackpad and uncheck ‘swipe between pages‘
This should immediately stop the option in Chrome.