While reading the comments I thought, "Surely there's a way to auto-submit bookmarks to the Wayback Machine, yes?" A moment of searching unearthed a Firefox extension for doing that. The commit logs at the Github repo show continual development since 2015.

Installer: https://addons.mozilla.org/en-US/firefox/addon/archiveror/

Repo: https://github.com/rahiel/archiveror