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This is one feature that I will consider move to Orion
The idea is from Arc browser, that you can save a tab into a named folder or subfolders. You can close the tab, however the tab in the folder will still remain just as bookmark. This is a great way to organise common used links without locating the bookmarks
Space is also a concept in Arc. You could use space to cross cut the collections of links that you will use and immerse yourself in it.
https://resources.arc.net/en/collections/3674563-tips-for-organizing