Archive.org has an extension that automatically downloads web pages you visit
https://chrome.google.com/webstore/detail/wayback-machine/fpnmgdkabkmnadcjpehmlllkndpkmiak
https://addons.mozilla.org/en-CA/firefox/addon/wayback-machine_new/
https://lemmy.world/pictrs/image/c898cffe-b8f3-46c6-8582-997d48133c63.png https://lemmy.world/pictrs/image/0828333d-4d58-480d-9d72-36762ee051b8.png
It will also detect when a webpage you are trying to visit is dead and will offer to replay an archived version