I absolutely love internet archive and wayback machine, and I wanted so much to love this extension.
But unfortunately it keeps giving me a crazy amount of fake positive unavailable webpages sometimes before it even tries to load, ruining my navigation in almost every session.
So why not just turn down the option of automatic detection and replacement of these pages and just keep the other great functionnalities ?
Because you just can't, you also cannot just reload the current page you were trying to reach when the extension find a fake positive, you re just stuck.
So uninstallation is the only way to go.
As long as this extension is not fixed and give absolutely no option to turn down the messy automatic error detection, stay away from this extension.