in mozdownload/scraper.py [0:0]
def platform_regex(self):
"""Return the platform fragment of the URL."""
platform_fragments = {'linux': 'linux',
'linux64': 'linux64',
'mac': 'macosx64',
'mac64': 'macosx64',
'win32': 'win32',
'win64': 'win64'}
return platform_fragments[self.platform]