Are you using a download manager? [https://support&#46;mozilla&#46;org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} A small dialog should appear&#46; Click '''Start In Safe Mode''' (not Refresh)&#46; Is the problem still there? http://kb.mozillazine.org/Issues_with_Firefox#Downloading_opening_or_saving_files https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can ''philipp [[#answer-1256712|said]]'' <blockquote> 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... </blockquote> Also see; https://support.mozilla.org/en-US/kb/unable-download-files-windows-10-parental-controls

As I said, I do not have parental controls activated. No I do not use a download manager. Starting in safe mode did not help I'm afraid.

Go to the [https://addons&#46;mozilla&#46;org/en-US/firefox/ Mozilla Add-ons Web Page] {web Link} (There’s a lot of good stuff here) and search for a download manager. 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.