If I'm wriitng text in some text box, and close the tab by accident, it would be helpful to get a confirmation dialog with something like "are you sure you want to go away you'll lose text" (similar to how gmail does it), also it would be nice to have this warning whenever an ajax call is still active.
Yeah, the one in the shot above is a browser native thing. I thought they all did it now but maybe they don't or we're accidentally disabling it, or the text in question was being typed into some unusual field.
@chad - the autosave functionality is fantastic. I think this compensates for the close tab issue, except for the corner cases of when the AJAX request to remarkup is still pending.
My internet connection is comparatively slow so I guess it's a slight issue for me, but shouldn't be a problem for most others. On a related note, I experimented a bit with the auto save and I found another minor possible bug in T4580
After we've been using phabricator for a while, we found the auto-save is a better approach to handling closing-browsers. We've had people who've started writing a comment and then changed their mind half way, and appreciated not getting a "are you sure you want to quit" nagging dialog.