I have used Foxmarks/Xmarks for a long time now. I use it to manage my bookmarks across 5-6 machines. And on occasion log in on say a family members computer to grab a url. The issue with my Chromebook is that it want let me turn off "sync" and I keep getting pop ups telling me to disable sync. Should make the change and let Chrome manage my bookmarks? Can you access your bookmarks from the web as with Xmarks?
Not sure I follow. Xmarks is in the Chrome Web Store so see no reason why you cannot use it to manage bookmarks as advertized. Description here: " Xmarks synchronizes across multiple computers, and across web browsers: Chrome, Firefox, Safari and Internet Explorer. After you install the add-on, click on the Xmarks icon to start backing up and synchronizing your bookmarks.
Xmarks also synchronizes your open tabs across computers and browsers! Learn more about tab sync here Xmarks and for password management see http://lastpass.com/"
I didn't realize Xmarks was available for Chrome, too, now! That's awesome! I used it for ages with Firefox before I switched to primarily Chrome and then started fresh on Chrome because I didn't know it was compatible.