Discontinued - Use the official Internet Archive extension instead:
https://addons.mozilla.org/en-US/firefox/addon/wayback-machine_new/

A must have for your modern web surfing!

Simple and gets the job done.
I like the options to change Time & Date and also to enable/disable context menus.
Thank you.

minimalism

I don't know what's wrong but I always get "Page Not Archived. An unkown error occurred. Try again later." when try to archive. I recall this case happen long time ago and I solved it but I can't recall how I solved it.

Compatible with Waterfox Classic.

Yea!

Release notes for 5.3.8:

https://github.com/VerifiedJoseph/Save-to-the-Wayback-Machine/releases/tag/v5.3.8

Finally one that will open http://web.archive.org/web/*/
Thank you!