It works perfectly on the latest Mac OS & Firefox versions.
Not sure why people complain it doesn't on Windows. The description of this extension states it clearly:
"The iCloud Passwords extension is compatible with macOS Sonoma or later. It is not available for Windows at this time."

Didn't you read that?

Does not work, FF133.03, Windows 11. Complains that I am not running Edge or Chrome. It's a FF extension?

I was waiting for this for ages. Thank you Apple.

All Features got removed and now it only display to use Chrome or Edge :/

Works perfectly on Firefox (including 133). Just make sure you have an active session (click extensions icon then select iCloud passwords).

Dommage non compatible avec MacOS Monterey :(
Merci aux développeurs de faire le nécessaire pleeeeease.

For now this add-on breaks some websites experiences like for example Reddit, where the website becomes slow and unresponsive for a few seconds from time to time.

Unusable, freezes the browser. Pops up a message about slowing down Firefox :( Please fix!

Getting messages saying that iCloud Passwords is slowing down Firefox.

This is a great starting point but it's slowing down some websites like dropbox paper.

Super! No problems. On iMac M1 and MacBook Pro M4 14" both with Sequoia 15.1.1 and Firefox 133.0

Nicely done. But it seems that 2FA code can't be filled on some sites. Still needs some work.

Ne fonctionne PAS avec Firefox 115 sur un vieux maxbook :(

NOT WORKING Firefox 133 !!??
A popup says 'klick here to allow autofill' - you klick, and nothing happens.
How embarrassing is that!!!

Does not work with firefox 133.0, clicking on the popup does not fill anything.

Enabling this extension alone makes typing in any text box in any websites laggy! This is truly one of the worst software experience I ever had! It constantly asks me to reenter the 6-digit code for no reason. Who approved this?