Now that XUMM 0.5.0 offers users the option to choose which XRPL explorer they want to use in order to open a specific "event" and have the opportunity to analyze a transaction with a greater level of detail, I think it would be a nice addition to show, for instance, Address Book addresses with a hyperlink. In this sense, a user would be presented with at least three options when clicking/selecting an XRPL address in XUMM: (i) share address; (ii) copy address to clipboard; and/or (iii) open address with preferred XRPL explorer.