Forum Discussion

Spark Zhang's avatar
Spark Zhang
Brass Contributor
Jun 05, 2023

Web content filtering and indicator aren't working on third party browser

Hi, we have just noticed that web content filtering and customized indicators are not working on third party browsers after upgraded defender for endpoint to 4.18.23050.3, the issue has happened to b...
Nweber531's avatar
Nweber531
Copper Contributor
Mar 13, 2024

CharlieAD we have heard from Microsoft support that disabling Quic in chrome will resolve this as network protection for defender does not support quic protocol.  Since testing with it disabled in chrome we have seen it working correctly so far.  No word whether or not support for this is coming in the future for network protection.

 

I did the below to test but ended up pushing out in Intune for some of our staff devices to test further

 

To disable HTTP/3 (QUIC) in Google Chrome, please follow these steps:


Open Google Chrome.


In the address bar, type: chrome://flags#enable-quic


Locate the Experimental QUIC protocol flag.


Set the flag to Disabled.


Relaunch Chrome for the setting to take effect.

 

 

IrfanAhmed's avatar
IrfanAhmed
Copper Contributor
Jun 13, 2024
Hey there - was there any document or technical reason cited? We've been told by support to disable the QUIC protocol on our supported browsers (Edge and Chrome) but not why. I cannot find any reference for Network Protection / Web Threat Protection having a bad interaction with QUIC. Moreover, QUIC is supported and is natively enabled in Edge and Chrome so if this protocol wasn't, why would MS leave it in "default" state ?
Thanks a lot in advance!
  • ygoralmeida's avatar
    ygoralmeida
    Copper Contributor
    Aug 25, 2024

    IrfanAhmed 

     

    25-08-2024 - and still not working as expected.

     

    Your IT administrator would have caused Microsoft Defender Exploit Guard to block a potentially dangerous network connection.
    Detection time: 2024-08-26T00:29:29.658Z
    User: S-1-12-1-3639746192-1275162949-2184531103-2650002400
    Destination: https:// x v i d e o s .com
    Process Name: chrome.exe

     

    But google chrome still render it normally the website is properly loaded

     

    Btw, i'm in Brazil region.

    No matter if i enable or disable the quic or even try the defender extension on google chrome.

     

    Anyclue on how to fix that ?