The current URL of the active tab (e.g. https://www.europeana.eu/portal/en/record/2020601/https___1914_1918_europeana_eu_contributions_10188_attachments_99133.html) is sent to the server so that the current record ID of the Europeana item which the user is currently viewing can be extracted, and saved to the user's MovesScrapbook account.