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I need to upgrade how? My pc s going to crash. I don't know how to upgrade Firefox.

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My pc needs an upgrade or it will crash. How do I upgrade Firefox?

My pc needs an upgrade or it will crash. How do I upgrade Firefox?

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Firefox (button) > Help > About Firefox = the update should automatically download

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You can find the latest Firefox 21.0.x release in all languages and for all Operating Systems here: