To get this extension to work on Windows you need to find an old version of iCloud and turn of autoupdate. I'm using 7.21, and the extension works for me.

I think what's important is that you don't install iCloud via Microsoft Store because that means the app is installed in a different location from what the extension expects

Cannot get it to work. iCloud keeps asking to download the extension while Firefox states it is installed and active.

don't do it. Apple doesn't believe bugs exist. Everything it's doing wrong, is a feature.

crap

The addon is completely broken (and has been so for years now!). The iCloud app acts like it's not installed when attempting to use it to sync bookmarks, even though it's installed and enabled. Fix your software, Apple!

Cannot get it to work. iCloud keeps stating to download extension, while Firefox states it is installed and active.

does not work if you enable icloud end 2 end encryption. as does the windows icloud app. fix these it has been 6 months

No funciona en la v111.0.1 (64-bit) de Firefox

This add-on for Firefox has been broken for years now. For a company with a reputation for high levels of QA, they sure suck bad when they suck.

Non funziona

同步不完全、重复书签、无法排序。。。和win版的iTunes一样，totally crap.

Waardeloos! Als je in iCloud aangeeft Firefox te willen gebruiken geeft iCloud een melding dat je eerst de Add-On moet downloaden, terwijl deze al is gedownload en is ingeschakeld in Firefox. Systeem blijft dan hangen, hoe vaak je het ook probeert.

Made specifically not to work. Duplicates bookmarks, deletes them, changes order of icons etc... Jails you inside Apple ecosystem and Safari.