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How do I tell if I have Firefox 32 bit or 64 bit?
I am trying to update my java add on, but I can not find ANYWHERE which version, 32 bit or 64 bit, of Firefox to know which one to install.
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You appear to be running 32bit. Mozilla Firefox isn't currently offered in 64bit on Windows, aside from the Nightly testing releases.
Your User Agent (check it from Help -> Troubleshooting Information) does indicate which version you're running, in a roundabout way - WOW64 is what Windows calls running 32bit applications on 64bit Windows. If you were running 64bit Firefox, you would see x64 instead.