Did you get an error message when you used the full installer from http://www.mozilla.org/en-US/firefox/all/

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

• Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
• Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

Error message reads...

Firefox.exe - System error

The code execution cannot proceed because VCRUNTIME140_1.dll was not found. Reinstalling the program may fix this problem.

Tried it several times but it doesn't help...

Turns out it was the mozilla vpn... it was somehow connected via Brussels via Prague no idea how that occurred I didn't do it... no wonder the browser couldn't find a thing.... bloody sack of shit Internet fuck around... as if I've got the time to faddle about for 12 hours faffing around like a prize dick cos some arse is screwing with the Internet by way of a ruse for some purpose I know not what... I'll be on my way now...

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

See "Visual Studio 2015, 2017, 2019, and 2022":

• https://docs.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist
• https://aka.ms/vs/17/release/vc_redist.x64.exe
• https://aka.ms/vs/17/release/vc_redist.x86.exe

You may also have to install the Visual Studio 2013 Redistributable Package. You need to reboot the computer.

Thanks guys...

Turns out it was the mozilla vpn

That was very good work. Well Done.

As to the VCRUNTIME140_1.dll error message, follow cor-el's instructions above.