Ah, I didn't notice the `javascript:` URL in there my first time reading this, but I suspect that won't work because of the [CSP](http://www.html5rocks.com/en/tutorials/security/content-security-policy/) restrictions on the site (in fact, if it *does* work, then I need to fix something!). Maybe have a `data-close-window-onclick` attribute that `bookmarklet-close.js` handles?