I would like to have "Scrollwheel-to-Zoom" and "Mouse-Drag-to-Pan" functionality, so it could replace the "Better Image Viewer" addon. Current features are nice to have but honestly, its not enough to add more clutter to the context menu. This seems to be a general problem with Webextensions. You end with many little extensions with few functions and each adds a button or menu entry.
It could also offer features from "Double-click Image Downloader", but i dont want to ask too much
Thanks and bye