I have the same experience. Bookmarks only are of little value. I think this situation would be better for me if the bookmark manager would download the page,

I have the same experience. Bookmarks only are of little value. I think this situation would be better for me if the bookmark manager would download the page, if possible extract the main content part sans the navigation and teaser boxes and built a searchable full text index from that. Optionally a snapshot of the page could be useful. For that I am misusing Zotero and the Zotero FF plugin. Apart from managing papers I have to read I also keep track of informative web pages. With sing Buku, emacs integration instantly came to my mind. Could be useful with the W3 browser mode or other modes that display URLs.