You can also try these related scripts:

• nicovideo-autoplay-canceler - ニコニコ動画で動画の自動再生が開始された直後に自動的に一時停止します。停止に少しラグがあるため、停止時の再生時間が3秒未満の場合は0秒まで戻します。「nicovideo-next-video-canceler」「nicovideo-player-expander」は別のスクリプトです。
• Append Tag Searching Tub - Adds “Keyword”, “Tags”, “My List”, “Images” and “Live” search tabs to all of the Niconico search boxes.
• Clone Turning Page Button in nicovideo - Also shows the pagination on the top of Nico Live search r###lt, Lives by Category page, and Nico Video user page.
• NicoVideo Post to SBM with selected tags - allows to search or post to SBM with multiple tags from tag list in NicoVideo watching page.
• [niconico video] Add the "Add My List" button to search r###lt page - Add the "Add My List" button to niconico video search r###lt page