I've just upgraded to 3.6.10 from 3.6.8, and now FF won't start. It gives an error message saying platform version 1.9.2.8 is not compatible with 1.9.2.10

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Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
You can skip the step to create a new profile, that is not necessary for this issue.
See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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    '''The Platform was revved up from 1.9.2.14 to1.9.2.15'''
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    I experienced this error updating from Firefox 3.6.13 to 3.6.14 and resolved it by doing a 'clean' install' as described. It occurred again in updating from 3.6.14 to 3.6.15 and this time a clean install failed to rectify it. (Anyway, I don't want to have to go through this every time.)
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    I had already tried a reinstall before, but thanks for the suggestion. Starting FF in Safe mode did not help either.
    XULRunner is specific to FF. Mostly found discussion about using the code in web pages when I used Google before posting.
    When FF went from version 3.6.14 to version 3.6.15 this issue started. Please note the Error message and the version info I just mentioned.
    '''"Platform version '1.9.2.15' is not compatible with minVersion > =1.9.2.14 maxVersion < = 1.9.2.14"'''
    '''The Platform was revved up from 1.9.2.14 to1.9.2.15'''
    I could not find information on: minVersion or maxVersion much less how to change them in XULRunner.
    '''''It is definitely a Mozilla FF issue'''''.
    Avast sandbox is up to date and works just fine with everything else. More importantly it worked just before the update was installed.
    The only reason I bothered with the update is because Mozilla touted it as a security issue and there was NO mention of any known issues with sandbox software.

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    Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
    Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
    It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
    You can skip the step to create a new profile, that is not necessary for this issue.
    See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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    Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
    Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
    It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
    You can skip the step to create a new profile, that is not necessary for this issue.
    See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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    It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
    See also http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall
    You can skip the step to create a new profile, that is not necessary for this issue.

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    # Delete the files and folders in the Firefox installation directory, default location is C:\Program Files\Mozilla Firefox\
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    It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
    You can skip the step to create a new profile, that is not necessary for this issue.
    See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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    # Delete the files and folders in the Firefox installation directory, default location C:\Program Files\Mozilla Firefox\
    # Download a new copy of Firefox from http://www.mozilla.com and install it
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    Do a clean (re)install:
    * Download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
    * Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
    * Don't remove personal data when uninstalling.
    * It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
    Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

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    Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.<br />
    Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.<br />
    It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
    You can skip the step to create a new profile, that is not necessary for this issue.
    See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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