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Why doesn't a 2 finger gesture of expand and contract work in version 4.0 ???

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The Rooted One
The Rooted One
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I had version 3.6.13 If I placed 2 fingers on my touchscreen and pushed them apart, the page would expand. Pull them together and it would contract. Upgraded to version 4 and that went away. Went back to 3.6.13 because of that feature. After customizing Firefox extensively, that feature is gone again. I un-did all the add-ons one by one and still can't get it to work. Any suggestions as to how to activate it in version 4 or get it back in 3.6.13??? 

  Thanks a lot,     Unkabuzz
I had version 3.6.13 If I placed 2 fingers on my touchscreen and pushed them apart, the page would expand. Pull them together and it would contract. Upgraded to version 4 and that went away. Went back to 3.6.13 because of that feature. After customizing Firefox extensively, that feature is gone again. I un-did all the add-ons one by one and still can't get it to work. Any suggestions as to how to activate it in version 4 or get it back in 3.6.13??? Thanks a lot, Unkabuzz

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cor-el
cor-el
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Some gestures have been removed in Firefox 4.

You can restore the zoom feature by changing the values of the related prefs on the about:config page. 

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
browser.gesture.pinch.latched -> false

To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.
You can use the Filter bar at to top of the about:config page to locate a pref more easily.