Ok I've been able to test the new patch now and I'm not sure that os.startfile is going to work. I've been able to get os.startfile() to open a specified browser (>>> os.startfile("chrome.exe", "open")), however, the function does not allow additional arguments(>>> os.startfile("chrome.exe", "open", "www.yahoo.com")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: startfile() takes at most 2 arguments (3 given))) so not even a url will be allowed to be specified as the code is written in the patch let alone specifying new window or new tab. Is this an error on os.startfile's part? The documentation for it seems to indicate that it should take multiple inputs. I don't have much experience with C to be able to find out figure out what the rest of your patch accomplished.