BookCrypt

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Encrypt your bookmarks from others on your computer. Add extra security to your bookmarking needs.Bookcrypt's entire purpose is to provide a safe and easy way to store the browser bookmarks you want to keep hidden from others. If you want to store bookmarks that you feel is sensitive information, than this extension is for you. If you feel like you want to keep your bookmarks secure from hackers, or even other users on your computer than this is for you. If you just enjoy safe and secure bookmark privacy, well then this is perfect for you.

BrookCrypt has end to end encryption of you bookmarks. Also unlike other similar extensions BookCrypt never sends any of your data(bookmarks) out to any cloud servers. All of your bookmarks are stored safely on your own computer. Bookcrypt doesn't even require any special permissions!