A good idea but... Rated 2 out of 5 stars
It doesn't quite work. The pages never load in the preview window and when you change the load time to 20 seconds and above (from 10) it just sits there spinning for 60 seconds. Also, the pin button is there inconsistently. It's usually not there, except for 1 out of 10 times. Maybe I'll try this again once it's improved.
The only thing that I like about this is that it uses less memory than cool previews (which I will unfortunately have to go back to, unless you have a better link preview suggestion), that surprises me though since lazarus form recovery uses so much memory that it crashes ff.