Safari Web Extensions

I'm very excited about bring web extensions back to Safari. I have an existing Safari App Extension and would like to port it back to Safari Web Extensions. I have a question about backwards compatibility. Will Safari 14 be backwards compatible with older OS such as High Sierra or Mojave?
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tylerdurden101390
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Yes, Safari 14 will be available with Web Extensions on macOS Mojave and macOS Catalina.
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timothy.hatcher
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