Comment 4 for bug 1452766

That sounds almost right, but for this detail: when the connection is lost, the loading will eventually time out, so the "page never finishes loading" is not really a use case. However it could happen that a page takes a very long time to load, and the user might want to bookmark the page before it finishes loading.

Note that when bookmarking a page before it finishes loading, or when it has failed to load, it is possible that the title of the page (which is the default value for the name of the bookmark) isn’t known (yet). Not much we can do about it, but something to keep in mind if we choose to allow bookmarking a page when it hasn’t finished loading.