Anybody know what this is? It was working 10 minutes ago and now firefox won't open.
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Sounds like a Firefox file got corrupted. Try starting in Safe Mode and see if that helps; if that doesn't do it, you'll probably need to re-install FF Portable.
You can also try asking on the MozillaZine forums; since this seems to be a FF issue instead of a FF Portable issue, they'll be able to help you more than we can.
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