“How to Sync firefox bookmarks between Win7, Win 11, and iCloud?: I have two Windows PC, new one is Win11, old one is Win7. I wish to sync my Firefox bookmarks between Win7 and Win11 and also sync to iCloud so that my apple devices can have the same list of bookmarks. How do I do that?”
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Use a Mozilla Firefox Account:
Having been discontinued, I’m not so certain you can get this to be performed in your Windows 7 PC. But, what you should do is create a Firefox Account, and then perform this synchronization in a continual manner. It will continually sync from there in ALL devices—as long as you are signed into the same Firefox Account on your PC and Mac
See Here: Firefox browser sync - Mozilla