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Enable Pinch/Zoom on Firefox 4 Web Browsers
Firefox 4 disables two finger pinch/zoom gestures on a Mac. Here is how to make pinch/zoom work again.

To enable pinch/zoom in Firefox:
  • Open a new tab.
  • Type in about:config and press Enter.
  • In the search pane, type pinch and press Enter.
  • Enter these values for the pinch.in and pinch.out prefs:
  browser.gesture.pinch.in         cmd_fullZoomReduce
  browser.gesture.pinch.in.shift   cmd_fullZoomReset
  browser.gesture.pinch.out        cmd_fullZoomEnlarge
  browser.gesture.pinch.out.shift  cmd_fullZoomReset
  

[crarko adds: I haven't tested this one.]
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Enable Pinch/Zoom on Firefox 4 | 7 comments | Create New Account
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Enable Pinch/Zoom on Firefox 4
Authored by: dschneiderch on Mar 23, '11 08:44:12AM

Doesn't work on my macbook from 2006 (pre-unibody) so I assume this only applies to those macbooks(pros) that have finger gesture functionality?



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Enable Pinch/Zoom on Firefox 4
Authored by: asmeurer on Jun 08, '11 06:54:48PM

Obviously. Pinch zoom (and other gestures) require a multitouch trackpad, so if your hardware doesn't support it, then you are out of luck.



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Enable Pinch/Zoom on Firefox 4
Authored by: sunsear on Mar 24, '11 11:58:10AM

That works, great stuff! Why the heck they disabled it in the first place??



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Enable Pinch/Zoom on Firefox 4
Authored by: cherrycasino on Nov 28, '11 08:41:30AM

This worked for me. I'm running Firefox 8.1, Snow Leapord 10.6.8, Early 2011 17" Macbook Pro.

thanks for the tip!



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Enable Pinch/Zoom on Firefox 4
Authored by: michelebowman on Jan 18, '12 03:36:08AM

Works great - thank you!! (it was driving me crazy!)



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Enable Pinch/Zoom on Firefox 4
Authored by: mdan on Mar 22, '12 02:38:15PM

Genius. Thanks so much, this was driving me mad.



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Enable Pinch/Zoom on Firefox 4
Authored by: pro_programmer on Oct 03, '13 10:42:30PM
Aha! Works awesome. Thanks for sharing Using:
Firefox 24.0


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