Web content filtering in Defender not working outside of Edge

[Daithi2115]

Trying to evaluate Cloud App and blocking Access to Email & Personal Storage 

While the likes of mail.yahoo and gmail is being blocked within Edge I'm able to bypass it with Chrome. I've Network Protection set to Enable (block Mode) within Intune. 

Am I missing some step that Chrome / Firefox needs ? 

[#2]

@Daithi2115 can you also confirm that real-time protection and cloud delivered protection are also enabled?

[#3]

@Keith_Fleming  Real-Time and Cloud Protection is Enabled 

[#4]

@Daithi2115
Please refer Microsoft Defender Application Guard Extension web browser add-on available for Chrome and Firefox.
https://learn.microsoft.com/en-us/windows/security/application-security/application-isolation/micros...

[#5]

Hi,
had a similar issue way early on in our deployment back when GPO was winning over Intune and found that there was a policy hiding. Could be that or someone else created a conflicting AV Policy or Config Profile.

I would quickly confirm Network Protection is actually landing properly on the endpoint with a quick:
Get-MpPreference | fl "EnableNetworkProtection"
0 == Off
1 == On

- Dylan