Neat little snippet, but I did have some issues. The "download file?" prompt is a bit unnecessary as it kept coming up when I'd enter a URL or click a link. Also, the bookmark screen needs an exit or close button to go back to the page. I went to Hawkee, bookmarked the homepage and couldn't close the bookmark screen, so I clicked the bookmark to return to the site and the app crashed. It also crashed randomly when clicking a link on this site. Nice example of how to do a basic Python GUI though.