I was trying and failing to do something like that. Basically, using ArchiveBox to download bookmarks, and then use recoll to index the webpages + PDFs + my own writing. Assumption was that I probably already bookmarked or had copies of what I wanted and just needed a quick way to find them. Was eventually going to import my browsing history as well. It ended up being more trouble than it was worth. (Too many bookmarks, not enough disk space, didn't know what the best setting for ArchiveBox were, Archivebox has its own search and I wasn't sure how that compared to recoll, unsure most efficient way to delete useless downloaded pages or curate them, etc.)

I do use uBlacklist and the Huge AI Blocklist subscription to try to clean up my search results. Not sure how effective they are over all though.