Most useful addon I've found Rated 5 out of 5 stars
I have several thousand saved snips and pages in Scrapbook on every one of my computers. Much of the collection size is because I'm saving genealogy data for people in my enormous family tree. That's in addition to all the other types of pages I like to save. My largest database is 1.26GB with 124,192 files and over 500 folders at the moment so that speaks to the ability of this addon to handle a lot of files - and it's not slow about it either.
I love the editing features as it lets me pare down a busy page into just the information I need instead of saving several little snips from one page. There's no need to keep ads or useless images. I do wish I could actually edit the text on the page rather than add a note. I'd also like to be able to remove any background colors or images in tables or the page itself.
It doesn't look like there's so much in my Scrapbook menu because I keep the saved items filed away in folders and subfolders. Still, each day I back the Scrapbook folder up, I'm amazed at how much more I've accumulated.
Scrapbook lets me be an organized digital packrat. ;-)