Why?

The scroll wheel on my MX master 3 doesn’t really work well with MacOS. Zooming is triggered by mistake quite often.

Windows:

• about:config
• mousewheel.with_control.action
• change the value to 1

Reference: https://support.mozilla.org/bm/questions/1253302

OSX

• about:config
• mousewheel.with_meta.action
• change the value to 1

In MacOS, meta key is the Command key. (Source)

The value 0 means “Do nothing”, 1 means “Scroll contents”, 2 means “Go back or forward in the history”, 3 means “Zoom in or out the contents”

More Info about the config