Hoardy-Web passively captures and collects dumps of HTTP requests and responses as you browse the web, and then archives them using one or more of the following methods: Hoardy-Web produces dumps in a very simple, yet efficient, WRR file format (also on GitHub). Moreover, Hoardy-Web implements: In other words, this extension implements an in-browser half of your own personal private passive Wayback Machine that archives everything you see, including HTTP POST requests and responses (e.g. answer pages of web search engines), as well as most other HTTP-level data (AJAX, JSON RPC, etc). For more information see project’s documentation (also on GitHub) and extension’s Help page (also on GitHub) (also distributed with the extension itself, available via the “Help” button from its popup UI), especially the “Frequently Asked Questions” section there (also on GitHub). Also, note that: Hoardy-Web was previously known as “Personal Private Passive Web Archive” aka pWebArc.