.mcas.ms Auto-remover

Automatically removes '.mcas.ms' from URLs containing '.mcas.ms/v5/ui/' enabling document uploads and downloads.

As of June 2026, .mcas.ms Auto-remover has 3 users in the Developer Tools category.

Developer Tools

Chrome Web Store ↗.crx

Users0%

Rating0%

—

— reviews

Reviews0%

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Version

1.0

Manifest V3

History

9 snapshots

Tracking since Apr 16, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 16, 2026	3	—	—	1.0
Apr 22, 2026	—	—	—	1.0
Apr 27, 2026	3	—	—	1.0
May 4, 2026	5	—	—	1.0
May 10, 2026	6	—	—	1.0
May 15, 2026	4	—	—	1.0
May 21, 2026	5	—	—	1.0
May 27, 2026	3	—	—	1.0
Jun 3, 2026	4	—	—	1.0
Now	3	—	—	1.0

Permissions & access

Permissions: declarativeNetRequest
Host access: *://*.mcas.ms/v5/ui/*

Screenshots

About

This is a basic extension that automatically removes ".mcas.ms" from urls containing ".mcas.ms/v5/ui/",

This fixes an M365 issue for a specific organization where some users where the .mcas.ms is not automatically removed from the v5 page preventing them from Downloading, or Uploading forms, nor viewing other documents.

This extension does not collect, store, transmit, or view any personal data.
For those doing Cyber related studies. The source code is provided below as an example of a simple browser extension created within an hour to solve a common problem.
It is no more then 10 lines of code and fully commented with explanations.
https://github.com/LachlanDavis/m365-mcas-autoremover/

Technical

Version: 1.0
Manifest: V3
Size: 3.27KiB
Min Chrome: 88
Languages: 1
Featured: No

Metadata

ID: fbofjdmjgkjbgccedaalgjenlanckolg
Developer ID: u43e86e74505b819cb46a5791449d617e
Developer Email: [email protected]
Created: Mar 10, 2026
Last Updated (Store): Mar 11, 2026
Last Scraped: Jun 9, 2026
Website: —
Support URL: —
Privacy Policy: https://github.com/LachlanDavis/m365-mcas-autoremover/blob/main/PRIVACY.md