Windows 7 restarts in a guest profile after updating to Firefox 15.0.1

Win 7 64-bit works normally after installing the FF 15.0.1 update. But when I quit and restart, Win 7 uploads to a guest profile (and a totally new empty desktop). I had to go into Win safe mode and do a recovery (i.e. a point before the FF update) to get back to my original profile with all the usual files and documents. This has happened 3 times. Any advice or assistance is much appreciated.

I had the same problem. Went through a lot to try and get my profile back. Now it just happened again when updating 15.0.1 to 16.0.1.

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sound problems:
#Restore speaker icon to System Task bar, right-click on clock or tray > Properties > Volume: On
#Click on the Sound icon in System tray then on Mixer, make sure Firefox is not muted [http://dmcritchie.mvps.org/icons/fx_sound.png picture]
Additional references
* [https://support.mozilla.com/en-US/kb/No%20sound%20in%20Firefox No sound in Firefox | Troubleshooting | Firefox Help]
* [http://support.mozilla.com/en-US/kb/Video%20or%20audio%20does%20not%20play Video or audio does not play | Troubleshooting | Firefox Help]
* [http://kb.mozillazine.org/Video_or_audio_does_not_play Video or audio does not play - MozillaZine Knowledge Base]

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Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
* https://support.mozilla.com/kb/Safe+Mode
* [[Troubleshooting extensions and themes]]
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https://support.mozilla.org/en-US/kb/fix-problems-connecting-websites-after-updating
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and here:
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Your message seems to have covered all the normal things we check.
When you tried using v36, did you have any add-ons? Have you tried;
'''https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles'''
'''Windows: 32-bit''' C:\Program Files\Mozilla Firefox\firefox.exe -p
'''64-bit''' C:\Program Files (x86)\Mozilla Firefox\firefox.exe -p
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It would be best to have the full path so if you had placed the untared contents
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on end. You can also have the exact "profilename" after the -P so Firefox
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Old Toad wrote:
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Blue
It sounds like you restored from an old back-up. Did you back-up just before your software update? It will use your last one and if your last back-up was a ywear old then it will use that one.
In general, if you are getting these messages on your iPhones select logout (when you get that Apple Id request) and then log back in with your newer ID.
Sorry for your losses.
Cheers

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Windows 7 restarts in a guest profile after updating to Firefox 15.0.1

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