I don't think it's exactly what you might be after, but in Firefox there is an add-on called "Scrapbook" that I use to manually save copies of web pages I bring up on my screen. They are saved in HTML format in an indexed, searchable library.
Also, don't forget your history file and that your browser cache might be automatically saving a lot of stuff, so a cache reader (Nirsoft has some good ones) can come in very handy.
Thought it could be of use/help to mention these.
I've not come across Hooeey before. I might trial that.