Please explain the problem in detail. What happens? What are the exact error message(s) ?

No error message it just says download failed

An ISO file is a system file. It's possible it was blocked for that reason, maybe.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

The problem is still here I tried safe mode but it did not do anything

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

This download manager works separately from the browser. The browser tells it what to download, and off it goes.

http://www.freedownloadmanager.org It is a powerful modern download accelerator and organizer for Windows and Mac.

Im afraid safe mode did not do anything i am currently downloading the download manager

The download manager is installed and i copied and pasted a link into it and its downloading but is there a way i can set it up to automatically use the download manager

Actually Never mind i figured it out thank you everything is downloading and very fast thank you for the amazing recommendation

Glad to help. Safe Surfing.

I have been using FDM for years.

hi, is your device/account somehow protected by windows parental controls?

the problem you're seeing is likely https://bugzilla.mozilla.org/show_bug.cgi?id=1586228 which is currently under investigation...

Yes i do have windows parental controls enabled only to check the computers uptime