Issue: How to fix Network Protocol error in Mozilla Firefox?
Hello. While I was browsing the web through Mozilla Firefox I encountered a strange message “Network Protocol Error” seemingly out of nowhere. It is preventing me from accessing a website. What should I do?
Mozilla Firefox is a free and open-source web browser created in 2002. In 2012, Mozilla was recognized as the most trusted Internet company for privacy. As of 2022, Firefox is the fourth-most popular desktop web browser after Google Chrome. However, as with many other browsers, people can encounter various errors while trying to access websites. Users report receiving a Network Protocol error in Mozilla Firefox. The full message reads as follows:
Network Protocol Error
Firefox has experienced a network protocol violation that cannot be repaired.
The page you are trying to view cannot be shown because an error in the network protocol was detected.
Please contact the website owners to inform them of this problem.
Browser errors can appear due to many reasons. Sometimes they are caused by connection problems, web address typos, and problems with the website itself. However, the Network Protocol error in Mozilla Firefox seems to be caused by cache accumulation. In this guide, you will find instructions that will teach you two ways to clear the browser cache.
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Method 1. Reload the Website
To fix “Network Protocol Error” or “Corrupted Content Error”, you need to reload the webpage while bypassing the cache.
- Press Ctrl + F5 or Ctrl + Shift + R keys. It will reload the webpage fresh from the server, not from the Firefox cache
Method 2. Clear the Firefox Browser
Keep in mind that after completing this step, Firefox may sign you out of the logged-in websites.
- Go to Edit and choose Preferences
- Navigate to Privacy & Security tab on the left pane. Now clear the Firefox cache by clicking on the Clear Data option
- Check both Cookies and Site Data and Cached Web Content options
- Click Clear
- Close the Firefox browser and restart your system
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