I've checked [https://support.mozilla.org/en-US/questions/1220435 this post on cache files] where a user asks where to find cache files. `about:config` shows all we need. There is also a cache file viewer -i think this is an alternative to `about:config`. But this looks like a more detailed history stored on disk. Now, is it possible to see the DNS A records that the browser stores, translating a domain name to an IP?