Google options provide 404 errors. Half of the other options do absolutely nothing. This plug (when it works) does nothing more than copy and paste your current tab into an archive's homepage.

Does the the job well, but, it is not the best in it's category. I much prefer View page archive and Cache

Great for lost files

Life-saver to conveniently retrieve an archived/cached version of an unavailable page. Free and open-source works great under Firefox 57+.

just works thanks