Best Way to Get Existing Databases of Web Pages into Devonth

I have thousands of saved web pages from file/save page in Firefox and many many thousands more saved in Firefox scrapbook. What is the best automated way to get those pages into Devonthink? I would like to preserve the hierarchy of the existing structure, ie which profile and which scrapbook folder in that profile that the page comes from.

In addition (the reason to get it all into Devonthink), I want to be able to search page title, original URL, date saved, text content, etc - all of which is available in scrapbook. This would allow me to get all the data from multiple computers and multiple profiles into one place and find stuff.

thanks - Gred