launch app from browser

[David]

The question I have is if you want to get the html link to open a rev
document - either by your application or the IDE - it seems on tests
on OSX to open multiple instances of the application and not let the
application open multiple stacks. I know this can be got around using
text files to implement locks - and I remember some issue and I think
IDE or engine enhancements to work with these issues - but can't find
them :)

How do you get an html link to a .rev file not to open multiple
instances of the app?