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When starting Firefox, The procedure entry point ?JS_GetStringCharsZ@@YAPB_WPAUJSContext@@PAVJSString@@@Zcould not be loacated in the DLL mozjs.dll" is displaye

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When starting Firefox the following message dialog box is displayed "The procedure entry point ?JS_GetStringCharsZ@@YAPB_WPAUJSContext@@PAVJSString@@@Zcould not be loacated in the DLL mozjs.dll"

This began after upgrading to Firefox version 33.0

Chosen solution

Well remove them actually since you cannot open them. You can do this bby removing the default profile, however if you have things that you want to save back the file up first. Profile Manager - Create, remove or switch Firefox profiles

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Try to disable your toolbars, in the past this has been caused by malware.Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

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Chosen Solution

Well remove them actually since you cannot open them. You can do this bby removing the default profile, however if you have things that you want to save back the file up first. Profile Manager - Create, remove or switch Firefox profiles