old_contents: """Handle Firefox session."""
  #  Copyright 2015-2016 Masayuki Yamamoto
  #
  #  Licensed under the Apache License, Version 2.0 (the "License");
  #  you may not use this file except in compliance with the License.
  #  You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  #  Unless required by applicable law or agreed to in writing, software
  #  distributed under the License is distributed on an "AS IS" BASIS,
  #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #  See the License for the specific language governing permissions and
  #  limitations under the License.
  
new_contents: """Handle Firefox session."""
  #  Copyright 2015-2016 Masayuki Yamamoto
  #
  #  Licensed under the Apache License, Version 2.0 (the "License");
  #  you may not use this file except in compliance with the License.
  #  You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  #  Unless required by applicable law or agreed to in writing, software
  #  distributed under the License is distributed on an "AS IS" BASIS,
  #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #  See the License for the specific language governing permissions and
  #  limitations under the License.
  
  import os.path
  import sqlite3
  
  
  def load(profile):
      """Return the nicovideo.jp user_session string.
  
      Arguments:
      profile : str -- path for Firefox profile direcotry
  
      Returns: str
      """
      conn = sqlite3.connect(os.path.join(profile, 'cookies.sqlite'))
      cur = conn.execute(
          "SELECT value FROM moz_cookies "
          "WHERE name = 'user_session' AND host = '.nicovideo.jp'")
      return cur.fetchone()[0]
  
subject: Add load function