Downloaded FF 3.6, Error platform 1.9.2.14 not compatible with 1.9.2.15.

My previous version of FF installed 12 months ago, and updated periodically since, failed to open. I therefore uninstalled and downloaded Firefox 3.6 from your website. Went through "run" process and seemed to be OK, but received this error message - "Error: Platform version 1.9.2.14 is not compatible withminVersion >= 1.9.2.15 maxVersion < =1.9.2.15." I hope you can provide me with a reason for and a solution to this problem. Thank you.

Do a clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* http://www.mozilla.com/firefox/all.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
* Don't remove personal data if you uninstall the current version.
* 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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Downloaded firefox 5.0.1 last night, worked fine, Turned computer on today, Mozilla Firefox, it won't start. Get error message, Error: Platform version '5.0' is not compatible with minVersion =5.0.1 maxVersion =5.0.1" What do I need to do to fix it?

We downloaded firefox 5.0.1 last night, began working with it. It did fine. After about an hour, I turned off my computer. When I turned on my computer, I click on Mozilla Firefox and it won't start. I get this error message, " Error: Platform version '5.0' is not compatible with minVersion >=5.0.1 maxVersion <=5.0.1" from XUL Runner. What do I need to do to fix it?

The updater wasn't able to update all the files and some were left as older versions. 
Do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded 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.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile 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.
* http://kb.mozillazine.org/Profile_folder_-_Firefox
* http://kb.mozillazine.org/Profile_backup

Downloaded Firefox 6.0.2 and when launching get XUL Runner "Error: Platform version 6.0 is not compatible with minVersion =6.0.2 maxVersion =6.0.2

After downloading Firefox version 6.0.2 launching get XUL Runner "Error: Platform version 6.0 is not compatible with minVersion>=6.0.2 maxVersion<=6.0.2

If using Zone Alarm's browser virtualization or any other similar product or a sand-boxing program (i.e., Sandboxie), turn it off when updating Firefox or Firefox Add-ons. You can post on the forum for any such product that you might be using to get other instructions on the proper use of the product.
The updater wasn't able to update all the files and some were left as older versions. Do a clean reinstall. See: [http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update Browser will not start up - XUL Runner error after an update]
#Download a fresh Firefox copy and save the file to the desktop.
#*Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
#Uninstall your current Firefox version.
#*'''''Do not remove personal data when you uninstall the current version'''''
#*Your bookmarks and other profile data are stored elsewhere in the Firefox Profile 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.
#*See [http://support.mozilla.com/en-US/kb/uninstalling+Firefox Uninstalling Firefox] '''''and''''' [http://kb.mozillazine.org/Uninstalling_firefox Uninstalling Firefox (Mozillazine)]
#*Also see: [http://support.mozilla.com/en-US/kb/Backing+up+your+information Backing up your information] '''''and''''' [http://kb.mozillazine.org/Profile_backup Profile backup (Mozillazine)]
#Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
#*It is important to delete the Firefox program folder/directory to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
#*See: http://kb.mozillazine.org/Installation_directory
#Install the fresh copy of Firefox that you downloaded in step 1

XUL Runner, Error: Platform version 5.0 is not compatible with miniVersion =6.0 maxVersion =6.0

I get this error message when open Mozilla Firefox:
XUL Runner, Error: Platform version 5.0 is not compatible with miniVersion>=6.0 maxVersion<=6.0

The updater wasn't able to update all the files and some were left as older versions. 
Do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded 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.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile 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.
* http://kb.mozillazine.org/Profile_folder_-_Firefox
* http://kb.mozillazine.org/Profile_backup

Error: Platform version '25.0' is not compatible with minVersion = 26.0 maxVersion = 26.0 HELP!

Hi All,
I keep getting this error message when opening Firefox on my computer. However, if I run it as an Administrator it works fine. I have uninstalled and reinstalled Firefox including downgrading to older versions and still no luck. This is the Error I get:
Error: Platform version '25.0' is not compatible with minVersion > = 26.0 maxVersion < = 26.0 edit
Any help would be greatly appreciated.

If you use ZoneAlarm Extreme Security then disable Virtualization and reinstall Firefox. 
Other security software may have similar features to prevent Firefox from updating files properly.
See these pages for a similar issue with corrupted files:
*http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 26: http://www.mozilla.org/en-US/firefox/all.html
if possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.
*Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
*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.
*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.
If you keep having problems then also create a new profile.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Error: Platform version 6.0 is not compatible with minVersion = 6.0.2 maxVersion = 6.0.2 so what do I do? Using Win 7

Error: Platform version 6.0 is not compatible with minVersion >= 6.0.2 maxVersion <= 6.0.2 so what do I do? Using Win 7 Home Premium

If you use ZoneAlarm Extreme Security then try to disable Virtualization and do a clean reinstall.
* http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
*[[/questions/869812]]
*[[/questions/869951]]

After upgrading to 10.0.2 I get "Error:Platform version 9.0.1 not compatible with 10.0.2" and I have to reinstall ver 9

I'm, running WinXP Sp3. I downloaded 10.0.2 and installed it as an upgrade as I have done successfully with all other new versions. It installs, but when it tries to load I get the following error: Platform version '9.0.1' is not compatible with minVersion >= 10.0.2, maxVersion <=10.0.2. I then have to run Win Uninstall, and then reinstall 9.0.1 to be able to get back online.

If you use ZoneAlarm Extreme Security then disable Virtualization and reinstall Firefox.
See:
*http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
*[[/questions/880050]]

Firefox won't run: XULRunner - Error: Platform version 5.0 is not compatible with miniVersion = 5.0.1 maxVersion =5.0.1

Got this error. Tried to download and reinstall latest version. Said that it installed/upgraded ok. Tried to run again and got same crash.

The updater wasn't able to update all the files and some were left as older versions.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded 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.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile 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.

Can't update from 6.0! XUL runner says, "Error: platform version 6.0 is not compatible with min version =6.0.2 max version =6.0.2.

Tearing hair out because there is also a request to check whether another copy of Firefox may be installed, and have hence uninstalled and deleted every reference to Mozilla and Firefox several times, and hence have lost all bookmarks, cookies etc. Have to accept the latter, but still can't load the latest version. The downloaded exe file just will not load successfully. Any advice would be gratefully recieved. [email protected]

If you use ZoneAlarm Extreme Security then try to disable Virtualization.
* http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
*[[/questions/869812]]
*[[/questions/869951]]

I updated firefox to 6.0.1 today now it will not open just ...XUL Runner..Error: Platform version '6.0' is not compatible with minVersion =6.0.1 maxVersion =6.0.1 Help please!!

They is no info this all is it shows on screen

Are you using ZoneAlarm (Extreme)? 
If you have then try to disable that and do a clean reinstall of Firefox.
The updater wasn't able to update all the files and some were left as older versions.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded 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.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile 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.
* http://kb.mozillazine.org/Profile_folder_-_Firefox
* http://kb.mozillazine.org/Profile_backup

I cannot open firefox anymore...I recieve the following error message....Error platform version '8.0'is not compatible with minversion = 7.0.1 maxversion = 7.0.1 How do I fix this?

cannot use firefox

The updater wasn't able to update all the files and some were left as older versions. 
Do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded 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.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile 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.
* http://kb.mozillazine.org/Profile_folder_-_Firefox
* http://kb.mozillazine.org/Profile_backup

Error:platform version '33.03' is not compatible with minVersion -33.1.1 maxVersion -33.1.1

G'day all :)
I seem to be having major issues with Firefox not starting at all due to the above error appearing everytime I try to start Firefox.
I've uninstalled Firefox multiple times to no avail.
I've even gone into the registry and deleted these entries:
[HKEY_CLASSES_ROOT\FirefoxHTML]
[HKEY_CLASSES_ROOT\FirefoxURL\]
[HKEY_CURRENT_USER\Software\Mozilla]
[HKEY_CURRENT_USER\Software\MozillaPlugins]
[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla]
[HKEY_LOCAL_MACHINE\SOFTWARE\mozilla.org]
[HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mozilla]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\mozilla.org]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FirefoxHTML]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FirefoxURL]
again,to no avail.
The error just keeps popping up.
I'm at a total loss here.
Any help would be greatly appreciated.
Thanks in advance :).

Thanks for your quick reply,but that did not work and still getting the same error.
I'm using Sandboxie,no other antivirus or firewall software.

Installed 6.0.1 get message "xulrunner Error platform version 6.0 is not compatible with min version = 6.01 max version = 6.0.1

I did a search and the only instance of that name is with the Tom Tom GPS folder and that is not an exe file

Do you have ZoneAlarm?
See:
*[[/questions/869951]]
*[[/questions/869812]]

Firefox 6.0 will not run if Zone Alarm is active, gives error: XULRunner, Error Platform Version 6.0 is not compatible with minVersion + 6.0 maxVersion = 6.0

Windows 7
If Zone Alarm is disable Firefox runs

Try to ask in the ZoneAlarm forum.
*http://forums.zonealarm.com/

After updating to the latest version for Win7 64 bit, I get the following error: Error: Platform version '6.0' is not compatible with: minVersion 6.0.1 MaxVersion 6.0.1

On the top of the above message is says XULRunner

I have exactly the same problem and my Zone Alarm Security software is causing the problem when I try to open Firefox, however this did not happen in any previous versions of Firefox I have had, including version 6.0.0
I would also greatly appreciate help on this one, or at least hope Mozilla will sort this out in another update.

Downloaded FF 3.6, Error platform 1.9.2.14 not compatible with 1.9.2.15.

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