1. Preview links in current tab or popup window 2. Use shift⇧ + click link or drag link to open links for peek preview 3. Press Esc or just blur the preview window to close it
Known issues:
1. Some websites may not work properly due to `onfetch` handler of service workers 2. Some websites disable the drag event or shift⇧ + click event, so you can't use them to open links for peek preview 3. Links may not work properly when they redirect to another sites which have Content Security Policy (CSP) enabled
