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Why am I getting message, "Stack Overflow at line 133"?

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All of a sudden, I am getting messages on the home screen for "Stack Overflow at line 133 etc" What does this mean and do I need to worry about it? Plus, how do I stop it? the message comes up on the desktop after I have closed Mozilla Firefox. And it does not give a full error.....just a small box that says, "Stack Overflow at line 133" or sometimes a different number.

I am using Windows 7 Home Premium, Mozilla Firefox Browser(do not like IE). I also have: Avast Anti-virus, ZoneAlarm Firewall, Advanced System Care Pro, SpywareBlaster, Malware Fighter(part of the ASC stable) and Ccleaner.........I hasten to add, not all scans running at the same time. Is it okay to have all of these?

Maybe some are conflicting with each other and causing the "Stack Overflow" problem?

Thankyou for your help.

All of a sudden, I am getting messages on the home screen for "Stack Overflow at line 133 etc" What does this mean and do I need to worry about it? Plus, how do I stop it? the message comes up on the desktop after I have closed Mozilla Firefox. And it does not give a full error.....just a small box that says, "Stack Overflow at line 133" or sometimes a different number. I am using Windows 7 Home Premium, Mozilla Firefox Browser(do not like IE). I also have: Avast Anti-virus, ZoneAlarm Firewall, Advanced System Care Pro, SpywareBlaster, Malware Fighter(part of the ASC stable) and Ccleaner.........I hasten to add, not all scans running at the same time. Is it okay to have all of these? Maybe some are conflicting with each other and causing the "Stack Overflow" problem? Thankyou for your help.

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Does it also tell in which file that error occurs?

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).