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Steven J. Vaughan-Nichols

Fixing Firefox 4’s Mac multi-touch woes

By | March 25, 2011, 10:09am PDT

Summary: By default, Firefox 4 disables Macs’ multi-touch functionality, here’s how to bring it back.

I may not be a huge Firefox 4 fan, but I do like it and I use it, along with Chrome, on my Linux and Windows boxes. On my Macs Minis, I tend to use Safari. My wife, on the other hand, loves Firefox and uses it on her latest MacBook Pro all the time. Until that is, she updated to Firefox 4 and discovered that all her Firefox multi-touch goodness was gone.

She was no longer able to pinch in or zoom out of her Web pages with a few gestures on the MacBook Pro’s touchpad and she was not a happy camper. And, if she’s not happy, I’m not happy.

After playing around with it for a while, I elected to fix it the brute-force way: I uninstalled Firefox 4 and brought back a copy of Firefox 3.6.16 from her Time Capsule using Time Machine. In passing let me say that Time Machine is the best backup and restore program out there on any operating system. You just set it up once and then you don’t need to think about it every again until you still recover something and then recovering a file is as easy as one, two, three.

If I hadn’t a backup, I would have downloaded an older copy of Firefox. While older versions don’t seem to be available on the main Firefox site, you can still find them on such sites as Apple’s own download site.

Then, the immediate problem taken care of, I started looking in earnest for a real fix and I found one in LifeHacker. It turns out that Firefox’s developers, for reasons beyond me, had simply disabled multi-touch functionality. You can bring “pinching” back by getting under Firefox hood by typing: “about:config in the address bar. About.config lists Firefox’s application settings (aka preferences) which sit inside Firefox’s JavaScript profile files: prefs.js and user.js, Once there, do a filter search on “pinch.” This will bring up the following Preference Names. Select each of the following and modify their values to the following:

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

You can also re-add “twist” gestures by searching on “twist” and making the following changes:

browser.gesture.twist.left  Browser:PrevTab
browser.gesture.twist.right Browser:NextTab

Although Mac users are the ones running into this problem, Windows and Linux users that have multi-touch capable touchpads have this problem as well-there just aren’t that many of them compared to Mac multi-touch users. Hopefully, Firefox will activate all this functionality by default in the first update. After all, it harms no one to have multi-touch ready to go and they’ll make the people, like my wife, who already use it constantly happy. It sounds like a win-win to me.

See Also:

Why Firefox WILL survive

Why Internet Explorer will survive and Firefox won’t

Four Reasons Firefox 4 can make a go of it–And one reason why it can’t.

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Steven J. Vaughan-Nichols, aka sjvn, has been writing about technology and the business of technology since CP/M-80 was the cutting edge, PC operating system

Disclosure

Steven J. Vaughan-Nichols

Steven J. Vaughan-Nichols is a freelance writer. He does not own stocks or other investments in any technology company.

Biography

Steven J. Vaughan-Nichols

Steven J. Vaughan-Nichols, aka sjvn, has been writing about technology and the business of technology since CP/M-80 was the cutting edge, PC operating system; 300bps was a fast Internet connection; WordStar was the state of the art word processor; and we liked it.

His work has been published in everything from highly technical publications (IEEE Computer, ACM NetWorker, Byte) to business publications (eWEEK, InformationWeek, ZDNet) to popular technology (Computer Shopper, PC Magazine, PC World) to the mainstream press (Washington Post, San Francisco Chronicle, BusinessWeek).

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RE: Fixing Firefox 4's Mac multi-touch woes
FAULKNE 13th Oct
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Last shred of credibility
sagec 25th Mar 2011
"On my Macs Minis, I tend to use Safari"

Nuff said. Consider the souce guys and gals...
0 Votes
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Or you could put your prejudices aside and read on for a helpful tip that covers all versions of FireFox across all major platforms.
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RE: Fixing Firefox 4's Mac multi-touch woes
Telix Updated - 25th Mar 2011
"She was no longer able to pinch in or zoom out of her Web pages with a few gestures on the MacBook Pros touchpad"



If your older browser is working just fine don't fix it with a new one!
0 Votes
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Nice detective work! And thanks for the info.
0 Votes
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Thanks for that info. I was wondering what happened.

Why would you use Chrome? It was created by Google only to spy on you. Any marginal speed increases are more than offset by this fact. And now, Firefox has, unfortunately, copied the Chrome UI.
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Thank you! I just followed your instruction and my zoom is now working again! It took less than 30 seconds. It did tell me that I may have voided my warranty when I entered the program. What does this mean?
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@levibaker
yea, i Agree in It did tell me that I may have voided my warranty when I entered the program. Thanks !
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