Rated 4 out of 5 stars
I wanted to offer an alternative for folks with a certain specific need like I had. I wanted to download websites for offline viewing for on trips or in places without internet. Downthemall was fair, but didn't have all the options to download whole sets of sites as quickly as possible. I tried ScrapBook Plus and a couple other addons I found in search, but none made things as easy as I'd hoped.
Then I stumbled accidentally across unMHT, which seems to have been the best answer. You can download many\all tabs at once, saves each tab (or all the tabs together) as a single file, and the pages reopens properly to what I was looking at better than any other tool I've used.
It doesn't help you scrape links quickly, so it's a different type of tool. But if anyone else is looking for such a tool, suggest you try it out :-)