Best extensions for Safari OSX

Looking for any productivity extensions e.g. Handle Tabs / Auto sleep(hide) tab
4 recommended
  1. This website enables the Apple's Picture in Picture mode for any video, even if that website doesn't support it.
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  2. Pocket. Might be the most powerful bookmarking tool
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  3. Ayush MittalHead Of Digital Communications · Written
    Like SessionBuddy for Chrome. Session restore saves all your open tabs automatically or manually for you to re-open at a later date. Directly install the plugin here -
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  4. Jordan SchauFounder, Pure Cycles · Written
    Best Mac app