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Here's another related question to add to the list:

Is it possible for me to import Shiira's bookarks into Safari? (I know it can easily be done the other way around using one of Shiira's built in features)
 
Bumping to answer one of my questions in case anyone ever comes across this problem in the future.

You can use an application called Bookit to migrate Shiira's bookmarks into Safari.
 
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