I've been checking out this plugin this weekend and so far am pretty happy with it. But, when I come back to the tabs, it's difficult to quickly decide which ones can be closed and which not. I think it would be very helpful if you captured a screenshot of the page before suspending the tab. This would give an awesome visual reference. Here's a visual of what I mean...

Screenshots when suspended seems to be part of the extension now. This could potentially be closed.
@smaclell as of when? I have version 6.21, which seems to be the latest available in the app store, released 9/2015
I just started using the extension and could be completely wrong. On the settings page there is an option at the bottom to "enable screen capturing". My suspended tabs appear to have a screen shot to go along with them.
Here are the settings I am trying to use:

And here is a suspended tab which has a screenshot:

Is there something different you would like? I found the following two issues you might like which are requesting more enhancements to how the screenshots work:
@smaclell brilliant! I totally missed that setting! I agree, this can totally be closed.
Most helpful comment
@smaclell brilliant! I totally missed that setting! I agree, this can totally be closed.