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How do I fix a broken Firefox?

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Firefox was misbehaving--wouldn't let me print, certain videos wouldn't play...functionality was waning. Tried default settings, reinstalling...nothing helped.

NOW, after I installed the latest version, Firefox won't start. When I click the icon, nothing happens. I went to Add/Remove Programs, but even that had no effect. (I'm running XP.) Firefox is my favorite browser. Do I have to give it up?

Firefox was misbehaving--wouldn't let me print, certain videos wouldn't play...functionality was waning. Tried default settings, reinstalling...nothing helped. NOW, after I installed the latest version, Firefox won't start. When I click the icon, nothing happens. I went to Add/Remove Programs, but even that had no effect. (I'm running XP.) Firefox is my favorite browser. Do I have to give it up?

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