Forum Discussion

Copper Contributor

Jul 08, 2026

Edge >=150 blocks ALL extensions on *.cloud.microsoft (regression from 149) - no policy override

Starting with Edge 150, a hardcoded extension blocklist applies to *.cloud.microsoft (M365 Copilot and Microsoft 365 app surfaces). Extensions no longer run on these pages. This is a regression - on ...

ryanbuening-celina

Tin Contributor

Jul 21, 2026

Kelly_Y any updates on this? Workarounds? Is blocking extensions the intended behavior by Microsoft or is this truly a bug/issue?

Kelly_Y

Microsoft

Jul 21, 2026

ryanbuening-celina - The fix should be in the latest Beta version 151.0.4129.35 and it is expected to be in Stable 151 when it is released next week. Please test using Beta if possible and let us know if you are still reproducing the issue. Thanks!

0xadada
Copper Contributor
Jul 22, 2026
I tested with Edge 151 Beta `151.0.4129.35` fixed the issue on m365.cloud.microsoft and forms.cloud.microsoft but the others in my list remain blocked:

edgeservices.bing.com
copilot.microsoft.com
explore.microsoft.com
www.microsoft365.com
- Kelly_Y
  Microsoft
  Jul 24, 2026
  0xadada I've reached out to the team and some URLs may continue to block extension functionality because certain web experiences have restrictions in place that limit extension access by design. As a result, the behavior observed on those sites is expected and is not impacted by this fix.
  
  -Kelly
  - ryanbuening-celina
    Tin Contributor
    Jul 29, 2026
    > certain web experiences have restrictions in place that limit extension access by design.
    
    Microsoft should not be globally dictating at the browser level which user extensions can work with what URLs. This is very odd.
ryanbuening-celina
Tin Contributor
Jul 21, 2026
Yes, appears to be fixed in 151 beta. Thanks.