Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Rohkem teavet

why does my antivirus block firefoxsetup.exe

  • 1 vastus
  • 2 on selline probleem
  • 1 view
  • Viimati vastas philipp

more options

I have been trying to upgrade to Windows 10 and after installation, my adobe flash plugin crashes on every page! I updated mozilla and adobe flash and it still crashes..then I noticed in my antivirus that firefoxsetup.exe was blocked! I have no problems with Internet explorer, but truly prefer Firefox!

I have been trying to upgrade to Windows 10 and after installation, my adobe flash plugin crashes on every page! I updated mozilla and adobe flash and it still crashes..then I noticed in my antivirus that firefoxsetup.exe was blocked! I have no problems with Internet explorer, but truly prefer Firefox!

Valitud lahendus

hi, no original mozilla-built or provided setup file will have that name, so it is likely that you have downloaded some third-party adware-infected installer.

please always download software directly from its developers, and in the case of firefox only at its official location at www.mozilla.org/firefox !

How to install Firefox on Windows Troubleshoot Firefox issues caused by malware

Loe vastust kontekstis 👍 1

All Replies (1)

more options

Valitud lahendus

hi, no original mozilla-built or provided setup file will have that name, so it is likely that you have downloaded some third-party adware-infected installer.

please always download software directly from its developers, and in the case of firefox only at its official location at www.mozilla.org/firefox !

How to install Firefox on Windows Troubleshoot Firefox issues caused by malware