No libraries this time!
Earlier, I said
so I did, using primitives and flattening and json-of-list.
Check it out here!!!!!
(the actual fun code is inside, so you should look inside the project for the full effect)
I looked inside the blocks, and it looks very complicated, so complicated that i don't know how it works, nice.
Welcome to the forums! The set block just checks if the browser key exists, and if not, creates a JSON-ified list and stores it, and if it does exist, just sets a JSON-ified list to those browser keys.