Best extensions for Safari OSX

Looking for any productivity extensions e.g. Handle Tabs / Auto sleep(hide) tab
Posted 
2 recommended
  1. 5
    PiPifier
    This website enables the Apple's Picture in Picture mode for any video, even if that website doesn't support it.
    Comments (1)Share
  2. 3
    1Password 6
    Jordan SchauFounder, Pure Cycles · Written
    Best Mac app
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  3. 3
    1Password 6
    Jordan SchauFounder, Pure Cycles · Written
    Best Mac app
    CommentsShare