translators clutter

Hi! I'm very inexperienced with how zotero works, but have noticed that it is constantly adding files to my Macbook.
I use Chrome but zotero keeps adding 5KB-20KB Safari documents to the file Zotero-->Translators. I'm not clear if it's doing it all the time or just when I save a reference from Chrome. But the files are really bizarre and seem like snippets of text and images from the websites I've been on - not things I have wanted to keep at all.
I really need to clear some space on my computer, is it safe to just delete all these and keep the actual references I have in Zotero? (And is this normal?)
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