Windows 10: Firefox Failed Downloads

Since updating Firefox to version 76 I've been unable to download files properly, they consistently fail. I tried resetting Firefox, resetting download folder, resetting my network settings, disabling Defender and restarting my router but nothing helped.

I installed Chrome for the first time in years to test and downloads come through fine without issue.

I am using WiFi which isn't ideal but the signal strength seems strong and I've never really had a problem with downloads consistently failing mid way through before. Any ideas? Thanks.

:)

 

KB4025339 Fails Install 0x80070564

Thanks
I am trying Eagle 51's suggestions now. Windows Update troubleshooter found a bunch of errors and fixed all but one.The update is trying to download KB4025339 again. I'll see what happens. At step one troubleshooter finishes with one error unresolved "Potential Windows Update Database Error Detected-Not Fixed". Windows update stalled at 0%.

At step 2 same troubleshooter error. The KB finished a new download failed to install.
Did step 3 KB has downloaded but fails to install.

If Eagle's suggestion doesn't work I'll try EdTittel's suggestion

Tried bothe Eagle & Ed 's suggestions - do not work. Anyone else?

I have noticed that the latest update for my nvidia drivers has failed to update. Wondering about that!

 

New Windows Media Player Plugin for Firefox

Anyone who uses Windows Vista and Mozilla Firefox may be pleased to hear that the Windows Media Player team has now released a plugin for Firefox that should allow the browser to play WMP content on websites. Here are the steps to get it working:

• Installation of the Windows Media Player Firefox Plugin may require administrative access to your PC. It is recommended that you close all other open browser windows before continuing with the installation.
• Click the Install button to automatically download and install the Windows Media Player Firefox Plugin.
• Depending on your security settings, you may see a Security Warning dialog box. Click Install to install the plugin.

There is a known issue if you are using Firefox version 2.0.0.3 on Windows Vista with the installer failing with error code -203. To work around this simply restart Firefox (you will get a notification that Windows Vista will be changing the Firefox compatibility settings) and then install again - the second time should succeed.

The download is available here, and the new plugin works on all versions of Windows XP and Windows Vista (although it is mostly intended for Vista, as that currently has no WMP support in Firefox).

Source: Windows Vista Blog

 

Video Issues in Windows 10 With Firefox

Hi,

Thank you for posting your query on Microsoft Community.

Please provide the following information with us to understand the issue better.

• 
  Is the issue occurs in Microsoft Edge?
  

• 
  Let us know whether the issue is specific to online videos or it is happening with other videos present in your system too?
  
  As the initial troubleshooting steps, I would suggest you to check all the available Windows Updates. Installation of recent Windows Updates should fix the issue.
  
  If the issue still persists, then try updating the Display driver and check. Here is the steps:
  

• Press Windows Key + R on your desktop screen to go to run command box.
• Type devmgmt.msc and hit Enter.
• In Display Adapter, expand Display Adapter, right-click , and then click
  Update.

If the issues persists ,only with firefox then i suggest you to contact firefox support.

Please do let us know the status of the issue to assist you further.

Thank you.