@joshsiddle8 "Bookmark Duplicate Cleaner" is only for Firefox and discontinued.
I tried "Bookmark Manager and Viewer" but didn't find mention of the feature for finding duplicated bookmarks in the extension page.
https://webextension.org/listing/bookmarks-manager.html#:~:text=To validate%2C first%2C select the,at the top-right corner.
Do more on the web, with a fast and secure browser!
Download Opera browser with:
- built-in ad blocker
- battery saver
- free VPN