Please integrate with software-center to search for new apps
The current "right-click/open with/other application/find applications" could be improved by just offering
to launch software-center with "--search mime:text/html" (or whatever mime-type).
It should probably also a bit less nested ;) Like: "open-with/Find available applications" or even a top-level item for this in the context-menu. I leave the exact location to the designers. This would offer all the benefits of s-c like screenshots, reviews etc.