Quite recently Chrome has taken up the nasty habit of interpreting errant horizontal scrolling to mean "Go back," which is deeply frustrating. I hit the back button rarely enough that I do not foresee ever needing this feature, and I scroll up and down all the time so having that occasionally delete entered text, or leave a video halfway through, is just unnacceptable.
I've found some clear instructions for disabling Swipe Navigation for Chrome on OSX, but nothing for us Ubuntu-kids yet.