I like to be able to use whatever browser I want, whenever I want, use the browser's native bookmarking, and have new bookmarks show up in whatever browser I run next (not to mention show up on iOS Safari).<p>Bookmark something in Chrome, leave my desk, check the bookmark on the iPad. Surf on the iPad on the train, bookmark some things, review those bookmarks in Firefox on the PC.<p>The built-in bookmark syncs don't do this, unless you're willing to only use a single browser on everything.<p>Xmarks does this. If you're a developer using multiple browsers, seems like Xmarks would be essential kit.