Hi, Firefox.exe should not be in that location but your Profile should be. Firefox files can be found in these locations : C:\Program Files , C:\Program Files(x86) & C:\ProgramData

Simply Search for Firefox.exe

If need more help : As this is not a Firefox issue but a OS issue and do not have a answer beyond above for you please seek help from one of these respected sites

• https://www.tenforums.com/
• https://www.bleepingcomputer.com/forums/f/229/windows-10-support/
• https://answers.microsoft.com/

Please let us know if this solved your issue or if need further assistance.

Hi! No, there is no Firefox related folder in Program Files. I was the first surprised about it. And I didn't change the default installation folder. The only one Firefox.exe found is located in %USERPROFILE%\AppData\Local\Mozilla Firefox\firefox.exe

My OS is freshly reinstalled and up to date. And nothing found on any forum.

I'll try installing an older Firefox version.

No firewall issue on Firefox 60.0.2.

As stated FF isn't a O/S or firewall software that is done by the O/S or 3rd party software you install. And your saying no firewall issue with FF 60.0.2 is what exactly?

In the end, I installed the 60.0 version (the installer was downloaded from the Mozilla website). This time, FF has been installed by default in Program Files.

With the firewall rule set on program files/firefox.exe, everything works fine.

Then, I installed the update directly in Firefox 60.0 (not with the downloaded installer exe). And now, I can access the internet on the 61 version.