When pinning sites to shortcuts in iOS there is no way to reorder them. I have sites I like to keep in spot 1 & 2 but when I pin new sites they are put in front of the older pinned sites and there is no way to reorder them like in Edge or Safari. Also would be nice to edit the name of the sites in shortcuts too.
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Similar idea for Firefox for Android here:
Please allow shortcuts on the home screen to be rearranged into a different order(android phone)
This is pretty essential for me to use Firefox on ios.