Automatically-populated list of any/all SVG resources that have loaded on the page, with a button for each to save it to a local file.
(Bonus points for automatically detecting inline SVG elements and having a miniature preview and a save button for each of those too.)
Why? Well, for one reason, because it's increasingly common for companies/organizations to embed their logo in the page as an SVG. And if you plan on using their logo for anything, from a product review to historical writing (e.g., ten years ago they were called XYZ) to a parody or other critical work, it's nice to have a high-quality infinite-resolution version of it direct from the source.
Plus I'm a digital hoarder and like collecting things like official logo SVGs, even if I personally don't know what I'll ever use them for. They're small, which means the main expenditure is the effort to seek them out and save them, which is why I don't have very many.