Forum Discussion
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 both Win10 and Win11 machines.
Has anyone else got the same issue?
2025 and we're facing the same issues now. Web content Filtering for Categories works for Edge but not for Firefox/Chrome. We're on Business Premium License and MS 365 E3 licenses as well.
Applied Network Protection through Intune Configuration setting > Microsoft Defender Exploit Guard > Network Protection > Enable
Disabled QUIC for Google Chrome, tried both manually and through Intune Policy.
Installed extension "Microsoft Defender Browser Protection" even if I read somewhere it's not updated anymore(?) Didn't help though...
Still, I'm able to visit bestessays . com in Chrome (a rather non-harmful site I use as a test, as it's blocked in the rather non-harmful category of "School cheating".
Any ideas welcome.Is this still broken? that would be pretty bad if it was broken since June.... since it Mid November already it is still broken for me. Is there a certain platform # I have to be on now to get this start working for Chrome and Firefox? thanks for your help
Jubee101
For me yes,
I'm on the latest version of defender and I'm having the same problems as many people here.
Any suggestion?This was working correctly, but now Google appears to have changed something in Chrome. Now the behavior we are seeing is that if we type in the full address such as dropbox.com, it blocks correctly (we have it scoped/unsanctioned. But if you do a search for Dropbox, and navigate there via the search results, you can get to the unsanctioned sites. Our Microsoft Defender Browser Protection is still enabled on Chrome with no changes there. We are going to open a ticket with Microsoft but suggest others do too, so we get some traction.
Nweber531
Good evening!
how are you?
I hope you're doing well
Is it necessary to use Microsoft Defender Browser Protection with Chrome?
What about Firefox?
I'm having problems with third-party browsers too.
Any suggestion?
Regards,
- Also still does not work for us. Works as intended in Edge, but not in Chrome and Firefox. I see we're on a much newer version than the bug was reported on back in 2023 (currently 4.18.24010.12). I verified my test machines have network protection enabled. From my perspective, this has never worked - I remember seeing this over a year ago when testing this product.
- Still does not work for me either. I currently have a case open with Microsoft Premiere Support and its going around in circles. We have checked and rechecked the same configurations and despite everything the behavior remains the same - Edge consistently works, Chrome does not. This is very clearly a broken service and Microsoft on the hook to either fix it or formally declare that they don't support 3rd party browsers. I have sent Premiere Support a half dozen reddit and techcommunity posts highlighting this but we'll see if it reaches the right people.
In the meantime, I have applied a workaround in Intune using a device configuration for Chrome using the "Block access to a list of URLs (Device)" setting and adding the same list of URLs. It stinks that I have to maintain two lists and I don't always receive Defender alerts but at least its a consistent workaround since Chrome is the most popular browser in our small company.I have identified some solution. Could you please share the specific URL you tested? I will verify it on my end to confirm whether it works CharlieAD
- Is there someone who knows if there is already a fix for this issue besides die a roll back to a earlier version?
- a fix was published for the platform update way back in July. has yours stopped working this month? TBH I haven't checked this month but will be very dissapointed if they've broken it again
We are just configuring since last month in our customer enviroment.
In Edge everything works fine, but unfortunately in Firefox and Chrome nothing is blocked.
Is there something we need to configure for these browsers or should it work out of the box?
- We are experiencing this too.
- Hi All, I've confirmed that there is a performance issue after upgraded to 4.18.23050.5, the website loading time in the first time access from a 3rd party browsers are extremely longer than before.
I've raised this issue to Microsoft support and asked them to re-open the previous ticket.- We are seeing same performance issue in chrome after update to 4.18.23050.5. Have raised with MS but no update. If we roll engine back to .3 don’t see the performance issue, but it seems to auto-update back to .5. Anyone know how to stop it auto updating, just the engine? Or any better suggestions? Thanks
I rolled back the engine to version .3, which resolved the performance issue. However, I noticed that the engine automatically updates back to version .5. To prevent this from happening, I made changes in the Windows Registry Editor (Regedit) to disable the auto-update feature. These changes have successfully prevented the engine from updating itself, allowing me to maintain version .3 and avoid the performance issue.
- Hey, I'm having a similar issue except for me it's my first time installing Web Filtering through M365 Defender to a customer and i had told them this would work. I then tested and none of the categories, such as adult content were being blocked.
Can anyone tell me if this should block those categories in 3rd party browsers if network protection is setup? should it block all of the same categories that smartscreen in edge can block with this?- Never mind, I just tested it and confirmed that this was what was causing the issue and it's resolved now and working as expected blocking all categories.
- if you run get-mpcomputerstatus check if you have AMProductVersion of 4.18.23050.5 (or later for those stumbling across this down the line).
if you have that version and not 4.18.23050.# (#<5) then yes it will block custom URLs and categories just the same as via edge and better than third-party proxy agents- I just updated before seeing your reply! Thanks for your reply mate, I just used that exact command to determine if it was worth remoting on to remove the manually added AppLocker policy had had put in place as a work around temporarily and test, which I did and it works now with 4.18.23050.5.
Hello, does anyone have information if they released the new update?Spark Zhang
- MS has released 4.18.23050.5 to broad channel, you can find the latest update information from the link below.
https://www.microsoft.com/en-us/wdsi/defenderupdatesIm also being told 4.18.23050.5 fixes it. We are going to test. I thought somebody had already tested .5 in this chat days ago and confirmed it didnt ? Also .5 has been available for several days, way before MS said it included the fix....and the patch notes make no mention of it.
Off to test
It';s also avail on Update Catalog - https://www.catalog.update.microsoft.com/Search.aspx?q=Microsoft%20defender
Nothing yet 😞 Latest we had from our escalation support engineer was......no ETA
that was about 3 hours ago
- I am now updated to AMProductVersion : 4.18.23050.5 which appears to have resolved the issue. third-party browser access to a custom blocked url is now working again.
I have fed back to the support engineer that the response and time to resolution has not been good enough. This should have been an advisory, rollback, and notification to all defender tenants as all orgs will have been at increased risk of all manner of attacks over the last two weeks. "just use edge" doesn't cover compromises like persistence and C2 as they won't be using edge and smartscreen
- Its still not working with Version 4.18.23050.5, but not just with the third party browsers, but not with the Edge.
- We are seeing some clients begin updating to 4.18.23050.5, havnt tested those yet. However when asking MS for confirmation of the 'fixed' version this morning , they have stated 4.18.23050.6 is the fixed version........which is 'estimated' to release today.
Despite being told it was releasing for our tenant on Friday.
So still in the dark as to when this will be fixed. Currently blocking execution of all third party browsers to mitigate risk,
- Any luck sorting this guys ?
- from my support ticket you can rever the platform to the previous release (the broken one has apparently been marked to not re-update to) from an elevated command prompt:
“%programdata%\Microsoft\Windows Defender\Platform\4.18.23050.3\MpCmdRun.exe” -RevertPlatform
that said... on my test system that doesn't seem to have resolved it.- I can confirm that RevertPlatform isn't working on this issue.
Because MS has rolled out 4.18.23050 to the broad channel, so that even you have reverted to an old stable version, the MDE will automatically upgrade itself to the latest version soon.
Also you can't do a RevertPlatform on a new installed PC, as the previous release on the new installation is very old.
They should add switch for setting the target version.
