context_menu_item_label=Open this URI in Wayback Machine
button_label=Open current page in Wayback Machine
wayback_machine_url_title=Wayback Machine URL
wayback_machine_url_description=In case Wayback Machine will ever change its base URL, you can set it here yourself without waiting for this addon to update.
msg_error_connecting_title=Error asking Archive.org Wayback Machine for snapshot!
msg_error_connecting_text=Error code was %1s with response text being "%2s"
msg_malformed_response_title=Error asking Archive.org Wayback Machine for snapshot!
msg_malformed_response_text=Malformed response received from Wayback Machine: "%1s"
msg_no_snapshot_title=No snapshot!
msg_no_snapshot_text=We asked, but it seems Archive.org doesn't have snapshots for this page.
msg_requesting_snapshot=Asking Wayback Machine for latest snapshot of the page %1s

context_menu_item_label=Open this URL in Wayback Machine
button_label=Open current page in Wayback Machine
wayback_machine_url_title=Wayback Machine URL
wayback_machine_url_description=In case Wayback Machine will ever change its base URL, you can set it here yourself without waiting for this addon to update.
msg_error_connecting_title=Error asking Archive.org Wayback Machine for snapshot!
msg_error_connecting_text=Error code was %1s with response text being "%2s"
msg_malformed_response_title=Error asking Archive.org Wayback Machine for snapshot!
msg_malformed_response_text=Malformed response received from Wayback Machine: "%1s"
msg_no_snapshot_title=No snapshot!
msg_no_snapshot_text=We asked, but it seems Archive.org doesn't have snapshots for this page.
msg_requesting_snapshot=Asking Wayback Machine for latest snapshot of the page %1s

Change URI to the more specific URL
Change URI to the more specific URL

All URIs used for web addresses are URLs and are more commonly referred to as such.
It feels more natural to me at least.