Swift Preview help you browse websites faster and also saves you from the hassle of having too many tabs open inside your browser.
With Swift Preview installed, you can hover your mouse over any link on any web page and it will show a full preview of that page in an overlay window. You can change the default settings so that the preview is only activated when the Shift key is down.
If the link points to a YouTube video or an image file, the preview window will only show the video or the linked image.
You can remove the mouse cursor from the link and the preview window disappear or press the Ctrl key and the preview is enlarged – you can then navigate the embedded preview just like any other web page.