Running Chrome on a Windows notebook with a trackpad, the browser has a tendency to randomly zoom in at the most inappropriate of times, especially when using a combination of Ctrl-Click and cursor-moving to open multiple tabs. I put up with this quirk for months. That is until today, when it finally got the better of me.
At first, I went hunting for a solution in the form of a Chrome extension. Sadly, no one seems to have developed one and I'm not entirely sure it's possible to hook into this functionality via this method. (However, I did discover I wasn't the only one who had this problem.)
So, instead, I went into the Mouse settings via Control Panel, went to the Device Settings tab, selected my Synaptics touchpad and hit "Settings...". Now, not everyone has a Synaptics-based touchpad or the proper drivers installed, so the options will be different depending on your notebook and its hardware configuration. I had to disable "Horizontal scrolling" to prevent the zoom from kicking in, but for others it may appear as something else — pinch-zooming for instance.
With it off, I can now multi-click with abandon, without having to periodically groan and hit Ctrl-0 to restore the default 100 per cent zoom.