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There were rumors about third-party cookies being disabled by default in v22. I downloaded it and found this not to be true. Can anyone shed some light on when Mozilla plans on doing this? http://www.pcworld.com/article/2038956/mozilla-postpones-def...

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We're busy investigating possible unintended side-effects. So no precise calendar yet.

Thanks for the update! We're working to have expected functionality when third party cookies being disabled. I'll keep an eye on when it's planned to be released.

Is there a config flag to enable this?

The option has been in firefox as far back as I can remember. It's in the Preferences, under Privacy; you'll need to select "Use custom settings for history". I've never noticed any breakage, and I assume in-part because iOS and Safari set it as their default a few years back.

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