Ubuntu 18.04 Ctrl+Scroll Won't Zoom in Chromium

After installing Ubuntu MATE 18.04 on my laptop, I noticed that my usual method of zooming a page with Ctrl+MouseWheeUp and Ctrl+MouseWheelDown wasn't working with my touchpad (with edge scrolling) in Chromium and Chrome 69.0.3497.81. It worked when I had Ubuntu 16.04.

This is what I did to fix it. Do these steps as root.

This solves it temporarily:

modprobe -r psmouse
modprobe psmouse proto=imps

Once I confirmed it worked, I made it permanent:

echo "options psmouse proto=imps" >/etc/modprobe.d/psmouse.conf
update-initramfs -uv

The Trade-Off

Unfortunately, this made it so I was unable to disable tap-to-click. I opted to go back to the old protocol.

modprobe -r psmouse && modprobe psmouse proto=auto
rm /etc/modprobe.d/psmouse.conf
update-initramfs -uv

I've made another page on everything I learned about Mouse/Touchpad Drivers and Settings.