How to Repair Netflix Streaming Error Code F7121-1331

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Netflix error code f7121-1331 occurs when there is a problem with your web browser. Netflix has documented this error in its resource guide and has some troubleshooting tips.

If you also encounter this error, here are some troubleshooting tips to help you solve the Netflix error code f7121 1331 on your computer.

What causes Netflix streaming error F7121-1331?

  • An annoying ad blocker
  • Outdated browser version
  • Broken cookies or cache data
  • Hardware acceleration interferes with HTML5 playback

How to resolve error F7121-1331 on Netflix streaming?



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Clear your browser cache and cookies

  1. In Firefox, click the menu button.
  2. Select Preferences.
  3. Go to Privacy and Security.
  4. Look for cookies and website data.
  5. Click Delete data.
  6. Click Clear to delete all cookies and caches.
  7. Now try opening Netflix again.

Refresh your Firefox browser

  1. In the upper-right corner of the Firefox browser, click the menu button or the icon with the three lines.
    Select Help.
  2. Click the About button on Firefox.
  3. Click Restart to update Firefox.
  4. Wait for the process to complete.
  5. After restarting the browser, open Netflix and try again.

Disable Firefox browser extensions

  1. Launch your Firefox browser.
  2. Click the menu button or the three-line icon in the top right corner.
  3. Select Extensions.
  4. Click on Extensions.
  5. Find Flashblock and set it to Disable.
  6. Now open Netflix again.



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Frequently Asked Questions

According to some affected users, the F7121-1331 streaming error can occur if your Google Chrome or Mozilla Firefox browser is severely outdated or if the error or glitch causes Netflix to believe that the browser trying to connect is not actually supported by the browser.

  1. Turn off your device.
  2. Unplug the modem and router and wait 30 seconds.
  3. Reconnect the modem and wait until the new lights turn on.
  4. Connect the router and wait until the new lights start flashing.
  5. Turn on your device and try using Netflix again.

  1. Close the Netflix app and then open it again.
  2. Make sure your Internet access is working properly.
  3. Unplug the power cord from your device, then plug it back in.
  4. Make sure you have the latest software update installed on your device.
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