Corrupted Content Error [Firefox, Gmail]

Matthew Adams
by Matthew Adams
Windows & Software Expert
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  • When an error occurs while browsing the Internet with Firefox, there are two different culprits: the server or the browser. 
  • If the browser causes the errors, this article explores some of the things that you can do and check. 
  • Still having issues with this browser? See our dedicated Firefox errors section and find exactly what's wrong. 
  • Check out the Firefox area on the site for more articles about it. 
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Some Firefox users have stated that a Corrupted Content Error arises in Firefox when they try to open a few specific websites in their browsers.

The error message states: The site at [URL] has experienced a network protocol violation that cannot be repaired.

As a consequence, users can’t open the required sites in Firefox. These are a few resolutions that will probably fix the Corrupted Content Error.

Potential fixes for Corrupted Content errors

1. Switch to another browser

Opera browser to fix corrupted content error

Probably the easiest solution of them all is to completely switch browsers. Install Opera on your device and fire it up.

Easily import your bookmarks from Firefox and you are good to go. No more errors on your end.

Benefit from these top features:

  • built-in adblocker
  • free VPN
  • tab sync with all your other devices
  • video pop-outs

Basically, you will not miss a thing that is available on Firefox.

Moreover, you can integrate various messengers in the sidebar, such as Facebook Messenger, Instagram, WhatsApp, and Telegram.



Move from Firefox to Opera to benefit from fewer errors and nice, fast browsing experience.

2. Clear Firefox’s Cache

The Corrupted Content Error is usually due to corrupted caching. Firefox users have confirmed that clearing the browser’s cache fixes the issue.

Follow the guidelines below to clear Firefox’s cache.

  • Click the Open menu button at the top right of Firefox’s window.
  • Select Options to open the tab in the image directly below.

  • Click Privacy and Security on the left of the window.
  • Scroll to the Cookies and Site Data options.

  • Then press the Clear Data button to open the window in the shot directly below.

  • Then select the Cached Web Content option.
  • Press the Clear button.
  • Alternatively, users can click Show site information on the left of the URL bar when the Page not loading tab opens. Then click Clear Cookies and Site Data to open the window shown directly below.

  • Click the OK button to clear the cache for the sites listed on that window.

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Do them both using one simple tool: CCleaner.

Here’s why CCleaner is useful:

  • removes unwanted browser addons
  • tracks and deletes duplicate files
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It is also able to scan and delete cookies, cache, and such from Firefox and other browsers as well.



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3. Is the Webpage Down?

It might just be the case that the website is down. So, first of all, check if the website you’re trying to open is down or not. To do that, open the Is It Down Right Now website in a browser.

Then enter the website’s URL in the text box, and click the Check button. The server status check will then tell you if the website is down or not. If it’s down, it’s possible that Firefox will show a corrupted content error.

4. Hard Refresh the Webpage

If the website isn’t down, try refreshing the website that the Corrupted Content Error arises from.

However, users will need to hard refresh the page by pressing Ctrl + F5 keys at the same time in Firefox. That will hard refresh the page (or bypass the cache) to ensure that it displays updated content.

5. Clear the DNS Cache

Some users have also stated that they’ve fixed the Corrupted Content Error in Gmail by clearing the DNS cache. Clearing the DNS cache will also ensure that it gets updated.

This is how users can clear the DNS cache in Windows 10:

  • Close Firefox if it’s open.
  • Open the Win + X menu with the Windows key + X hotkey.
  • Click Command Prompt (Admin) on the Win + X menu.
  • Then enter ipconfig /flushdns in the Prompt’s window, and press the Return key. The Command Prompt will then state, Windows IP configuration successfully flushed the DNS Resolver Cache.

Having problems flushing the DNS? This guide comes to the rescue

Those are three resolutions that have fixed the Corrupted Content Error for Firefox users.

In addition, resetting Firefox by clicking Refresh Firefox on this webpage might also resolve the error for some users.

Editor’s Note: This post was originally published in March 2019 and has been since revamped and updated in August 2020 for freshness, accuracy, and comprehensiveness

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Editor's Note: This article was originally published in March 2019 and was revamped and updated in August 2020 for freshness, accuracy, and comprehensiveness.