If they stop supporting legacy extensions, then they'll be killing the Safari integration for 1Password, Evernote, Pocket, and many other important applications.

I'm wondering if it's worth the trouble of building a completly separate app extension for Safari, or if we can continue using the Safari Extension builder? This seems like a massive hurdle compared to Chrome, Firefox, and Opera who all support the same WebExtensions API. I see the 'suggested' way of doing this is now to create a Safari App Extension in Xcode, which requires building the extension primarily in Xcode and involves learning Swift (or Objective-C). Some background: I'm a web developer and would like to create a new version of my Safari Extension. If yes, how soon do existing Safari Extensions need to be transitioned to a Safari App Extension? AKA: How long until my Safari Extension breaks or is no longer supported for new users?.

Are Safari Extensions officially deprecated in favor of Safari App Extensions?.

I'm curious if someone could point me to an official post about this or post it here? My main questions are: I'm having trouble finding info on the reasoning, timing, and info on the transition from the old way of creating a Safari Extension to the new Safari App Extensions.

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