[ubuntu] Sudden many varied serious issues in firefox

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http://ubuntuforums.org – Running precise 12.04 KDE desktop Love firefox. Always worked like dream, 3 months now. No new upgrades, software, settings/preferences. Nothing. This morning whole computer suddenly running massively slow, ran top and found nothing running the CPU at more than 1 percent, but system monitor reported the load at 80%. Rebooted. Everything SEEMED fixed. On reboot, firefox suddenly had these issues. -Items listed on any/all pages or search engines are no longer links and must be manually entered into the address bar. - All bookmarks, history, etc. gone and despite preferences being set properl (Hardware)