docs: def auto_name_prefix(self):
          """
          Generate platform prefix for cross-platform downloads.
          """
          # if the platform is not native, auto_name would clobber native downloads.
          # make a prefix to avoid this
          native_system = std_platform.system()
          native_machine = self.CPU_ALIASES.get(std_platform.machine(), std_platform.machine())
          if native_system == self.system and native_machine == self.machine:
              return ''
          platform = {
              'linux': 'linux32',
              'android-api-16': 'android-arm',
              'android-aarch64': 'android-arm64',
          }.get(self.gecko_platform, self.gecko_platform)
          return platform + '-'