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The pinch option on my track pad ( Mac Bool Pro )dosen't work with FF 4.0.

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The track pad on the Pro Book allows one to increase the size of the font on things you read. You do this by pinching the track pad. That is to enlarge the font you move two fingers apart on the track pad. To decrease the size you bring them together. This option worked fine on the previous version of FF but 4.0 doesn't allow it.

The track pad on the Pro Book allows one to increase the size of the font on things you read. You do this by pinching the track pad. That is to enlarge the font you move two fingers apart on the track pad. To decrease the size you bring them together. This option worked fine on the previous version of FF but 4.0 doesn't allow it.

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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

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.