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Firefox showing up to date and out of date at the same time.

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Trying to use www.workflowy.com and the sites says my firefox is out of date. Help > About Menu shows I'm at 5.0.1 and up to date, but when I went to http://whatsmyuseragent.com/ it gave me this info: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12 (.NET CLR 3.5.30729)

also, here's for you http://whoisthecutest.com/

Trying to use www.workflowy.com and the sites says my firefox is out of date. Help > About Menu shows I'm at 5.0.1 and up to date, but when I went to http://whatsmyuseragent.com/ it gave me this info: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12 (.NET CLR 3.5.30729) also, here's for you http://whoisthecutest.com/

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Your UserAgent string in Firefox is probably messed up by another program that you installed.
http://en.wikipedia.org/wiki/User_Agent

type about:config in the URL bar and hit Enter
If you see the warning, you can confirm that you want to access that page.
Filter = general.useragent.
Right-click the preferences that are bold, one line at a time, and select Reset.
Then restart Firefox