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?
Answered by Frameworks Engineer in 613887022
Yes, Safari 14 will be available with Web Extensions on macOS Mojave and macOS Catalina.
Accepted Answer
Yes, Safari 14 will be available with Web Extensions on macOS Mojave and macOS Catalina.
Safari Web Extensions
 
 
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