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Is there a shortcut or a setting in about:config that allows me to use the pinch zoom feature with mouse and keyboard only? I dont' have a touch pad but like the pinch zoom much more than the classic "CSS zoom". I know I could use something like the Windows Magnifyer, but those tools rasterize the image...

Needs more jpeg
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1 Answers1

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Starting from Firefox 83, you can set the property mousewheel.with_control.action to 5 in the about:config page.

ctrl + mousewheel will then control the pinch zoom instead of the regular zoom.

If you need another key binding, you can use one of:

mousewheel.default.action
mousewheel.with_alt.action
mousewheel.with_control.action
mousewheel.with_meta.action
mousewheel.with_shift.action
mousewheel.with_win.action

The possible values from Firefox source code are:

0: Nothing happens
1: Scrolling contents
2: Go back or go forward, in your history
3: Zoom in or out (reflowing zoom).
4: Treat vertical wheel as horizontal scroll
5: Zoom in or out (pinch zoom).

(source code reference: WheelPrefs::Action::ACTION_PINCH_ZOOM)

Colin D Bennett
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Aa17Cc
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