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Can't download anything besides images

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Everytime I try to download something on Firefox specifically, it fails immediately. It doesn't even start. It just says "failed".

Everytime I try to download something on Firefox specifically, it fails immediately. It doesn't even start. It just says "failed".

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Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

Boot the computer in Windows Safe Mode with network support to see if that has effect.