Originally posted by rilef:
Opera 18 uses the same bookmark files ("Bookmarks" and "Favicons" and "Favicons-journal") as Google Chrome and other Chromium browsers. You can always copy these bookmark files from one browser to another, say from Chrome's user profile folder to Opera 18's user profile folder. You can also use many Chrome extensions, including Chrome bookmark extensions, in Opera 18. On the other hand, the Opera bookmarks extension is not recommended. It was designed for an earlier version of Opera Blink, which had no bookmarks, and does not use the same bookmark files used by Opera 18 and Chrome.
Bookmark and other Chrome extensions are available for download from the Chrome Web Store. Prior to visiting the Chrome Web Store, you should install the Download Chrome Extensions extension from Opera add-ons.
@rilef thanks for the tip. do you recommend any specific bookmarks extension?