Very good, very crucial addon, but after the Wayback Machine came fully back up into service in the wake of the outage, this extension's "Save Page Now" functionality has been spotty. Frequently tells me "Error: you need to be logged in to use 'Save Page Now'", despite the fact I am logged into the extension (and yes I did try logging out and logging back in, and this is after resetting my passwords on my Archive accounts).

EDIT: apparently this is a problem on the server API end, which is being looked into currently.