Keeping your bookmarks in sync
One of the issues I’ve frequently experienced when hopping between various machines throughout the day (my home desktop, school workstation, work machine) is maintaining a consistent list of Firefox bookmarks that I can access from anywhere. Have you ever found a great web page with a confusing URL, bookmarked it at home, but forgot to write it down and hence couldn’t share it with your coworkers or schoolmates?
I’ve recently come across a wonderful Firefox extension called Foxmarks Bookmark Synchronizer that solves the problem. The basic idea is: you set up an account that stores your bookmarks online, and the Foxmarks extension takes care of syncing your online bookmarks with bookmarks in your Firefox profile. All this is happening in the background, so what really happens is that your bookmarks follow you wherever you have included a Foxmarks account in your profile.
Another alternative that I haven’t personally tried yet is (expectedly) Google Bookmarks. It makes the pages you bookmark available from a drop-down menu in the Google toolbar, and provides overall similar features to Foxmarks, but IMO it doesn’t integrate into Firefox as natively as I would like (i.e. I cannot use the browser’s built-in bookmarks menu), and I don’t like cluttering my browsing window with extra toolbars.