At the time of writing (2026-06-18), Google Workspace appears to be starting to warn users from Firefox that they must use Chrome. This was for a Google Workspace Business Plus account and workspace, from an up to date browser and OS.

At this time, Firefox access still seems to work but I’ve no idea for how long.

Specific warning

Icon indicating that the user may soon lose their access to their account.
Secure your device for safe app access
To help keep your data secure, make sure that your device meets your organisation's security requirements
Next steps

    Download Chrome Browser and sign in with your work account

This was from a webpage with url https://access.workspace.google.com/remediate?urlparams=REDACTED

Screenshot below

Response from Google support

Absolutely nothing useful, repeatedly transferred around and took ages.

Why do I care?

My team need to make sure that their software works in multiple browsers, and I personally prefer using firefox and don’t want to be forced to use Chrome for no discernable benefit.