Fix ‘Err_quic_protocol_error’ Issue in Chrome Browser in 2023

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The Fix ‘Err_quic_protocol_error’ Issue in Chrome Browser

Do you occasionally see the Err_quic_protocol_error error in Google Chrome? Are you sometimes unable to browse sites using Chrome, but can use other browsers? Err_quic_protocol_error is an intermittent error that can often be difficult to troubleshoot, but Bollyinsidehas the answer. Here is how to fix the Err_quic_protocol_error error in Google Chrome.

Google Chrome has to be one of the most stable browsers on the market. It has been around for years and is being developed by a company for the benefit of you to be able to surf quickly and safely. Although surpassed by Firefox Quantum in terms of speed and functionality, Chrome is still used by millions of people and remains the backbone of other browsers that use Chromium.

The commercial version of the browser is very stable. One thing you need to consider is that Google guys like to experiment. They recently had to undo a change to Autoplay Audio because it accidentally disabled online browser games. Although rare, these things do happen and are the price we pay for a cutting edge browser.

Fixed Err_quic_protocol_error error

A quick note on the websites that offer to correct this error with a download. He doesn’t need it and it’s a very simple solution. While I am not citing any names, websites with just one tool fix all panacea for Chrome, Windows, or any program that sells snake oil. Even though they offer a fix specifically for this error, you don’t need it, so use these sites with caution.

The QUIC protocol is actually quite interesting but rather than burying the title, I’ll show you how to fix the error before discussing it.

The Err_quic_protocol_error seems to occur on fiber networks with fast routers. I have no idea why this is happening, but slower ADSL or ADSL2 routers don’t seem to have this problem. Anyway, here’s how to fix it.

  1. Open Chrome, type “chrome: // flags” in the URL bar and press Enter.
  2. Search or locate “Experimental QUIC Protocol”.
  3. Check the box to the right and change the setting from Default to Off.
  4. Restart Chrome for the change to take effect.

This should be enough to fix the Err_quic_protocol_error error in most situations. I saw a few where it didn’t and the only option was to uninstall and then reinstall Chrome. If you need to do that, here’s how. Once you’ve reinstalled Chrome, double-check the QUIC indicator as above so that it doesn’t happen again.

Under Windows:

  1. Open the Windows Start menu and search for Google Chrome.
  2. Right click on the entry and select Uninstall.
  3. Download a new copy from here.
  4. Select the installer and run to install.

On Mac:

  1. Right click on the Chrome icon in your Dock and select Exit.
  2. Use the Finder to locate Chrome and drag the icon to the trash.
  3. Download a new copy and install.

If you need to reinstall, this method should keep all of your favorites and settings. It replaces the basic Chrome files with new ones and recovers bookmarks and everything else elsewhere on your computer. Now Chrome should work fine without Err_quic_protocol_error.

The QUIC protocol

The Quick UDP Internet Connections (QUIC) protocol is an experimental network transport mechanism under development at Google. The idea is to eventually replace the TCP protocol. By reducing TCP overhead and multiplexing streams rather than doing them sequentially, QUIC is intended to be much, much faster than TCP.

A typical TCP connection involves a single flow and a lot of back-and-forth between your browser and the destination. There is a handshake, acknowledgment, synchronization, configuration, and initial data transfer before the first actual data packet is sent. This causes a delay and introduces the potential for bottlenecks. If one TCP packet is blocked, the others get stuck behind, resulting in a lag.

QUIC on the other hand was designed for speed. Rather than the multiple TCP configuration messages, QUIC does this in a single message. QUIC also uses UDP multiplexing which allows other messages to pass even if one is blocked. It also includes integrated congestion control for maximum efficiency.

Another feature of QUIC is error checking. It can easily handle lost packets and handle loss with speculative retransmission. TCP uses congestion avoidance, but this is limited to faster or less congested networks. Slower or unreliable networks cause TCP headaches. QUIC has its own packet limits and timing system to help manage delayed or lost packets.

QUIC has been in development for six years now and is still not finished. Google is the driving force behind it, but apparently less than 1% of web servers support it. If you want to talk about QUIC, this is a great resource.

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