ニコニコ動画のランキングページで、前回からの差分のみを表示します（一度表示した動画を隠します）。
短期間に何度もランキングを確認しても、同じ動画を何度もチェックしないで済むようになります。ニコニコ動画：GINZAにのみ対応。(2014/6/23)
バージョン履歴
1.2.3 修正できてなかったので修正。根本的に対策したのでもう大丈夫なはず。
1.2.2 履歴が一定より多くなると動かなくなる不具合を修正(chrome.storage.syncはlocalstorageよりだいぶ容量が小さいみたいです。)
1.2.1 エラー処理を追加。
1.2.0 googleアカウントでチェック済動画リストを同期するようにしました(chrome.storage.sync)。同期されない場合、chrome://settings/syncSetupを確認してみてください。
1.0.0 公開
Extore is a team of professionals who are passionate about creating extensions for web browsers. This devotion also gives us opportunity to appreciate work of other people. We get inspired by useful, open source extensions made by developers all over the world. Our strong belief is that one should share helpful add-ons with others. That’s why we’d like to present you our ever-growing list of favourite extensions that have inspired us. Moreover, as you probably have already learned, sometimes struggling for the best brings an end to the good. Talking about add-ons it often turns out that an upgrade is worse then previous version. Also it can become really tricky to get back to the beloved version of your favourite extension. That’s why we’re going to make not only the latest, but all versions of our favourite (and we hope yours too) add-ons available for download. No more compromises, just stick to the version you really like!
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