andig2 added the comment:
Looking further in webbrowser.py, FF uses GenericBrowser:
class GenericBrowser(BaseBrowser):
"""Class for all browsers started with a command
and without remote functionality."""
...
def open(self, url, new=0, autoraise=True):
cmdline = [self.name] + [arg.replace("%s", url)
for arg in self.args]
try:
if sys.platform[:3] == 'win':
p = subprocess.Popen(cmdline)
else:
p = subprocess.Popen(cmdline, close_fds=True)
return not p.wait()
If FF is already open, Popen.wait() returns TRUE for FF but FALSE for IE. This
leads to fallthrough for FF and then calling open for IE.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23945>
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