This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

Updated FireFox to new version, when I tryed to reopen it wouldn't, I tried to redownload and AVG told me "Found MalSign.InstallC.566", won't down load.

  • 4 valiny
  • 2 manana an'ity olana ity
  • 10 views
  • Valiny farany nomen'i James

more options

After updating FireFox and leaving the internet when I tried to reopen FireFox it would not. I removed fire fox from my computer and opened up the internet with Chrome, went to Mozilla and tried to reload FireFox. My AVG virus told me it found a threat: MalSine.InsallC.566. What is this, never had the problem before.

After updating FireFox and leaving the internet when I tried to reopen FireFox it would not. I removed fire fox from my computer and opened up the internet with Chrome, went to Mozilla and tried to reload FireFox. My AVG virus told me it found a threat: MalSine.InsallC.566. What is this, never had the problem before.

Vahaolana nofidina

ok, thanks for reporting back. can you try it with the full offline installer for your language/system that are available at https://www.mozilla.org/firefox/all/ instead?

Hamaky an'ity valiny ity @ sehatra 👍 1

All Replies (4)

more options

hello katy, please only download firefox from its official location at https://mozilla.org/firefox!

more options

I did go to mozilla's official site to down load, my AVG virus protection alerted this threat to me ( MalSine.InsallC.566 ) and it is the first time it has happen. Because of the name of this file I told AVG not to install this file and the Install discontinued. I tried to look this file up on the Internet and found nothing. I don't know weather to accept it.

more options

Vahaolana Nofidina

ok, thanks for reporting back. can you try it with the full offline installer for your language/system that are available at https://www.mozilla.org/firefox/all/ instead?

more options

Yes try the full setup as some antivirus may be fussy about the stub installer for Windows.