code: def load_mozlz4(self, path):
          
          with open(self.profile_path(path, must_exist=True), 'rb') as f:
              if f.read(8) != b'mozLz40\0':
                  raise NotMozLz4Error('Not Mozilla LZ4 format.')
              data = lz4.block.decompress(f.read())
          return data
docs: Load a Mozilla LZ4 file from the user profile.
  
          Mozilla LZ4 is regular LZ4 with a custom string prefix.