Acknowledging also means that an application server could incorrectly
receive a delivery receipt indicating successful delivery of the push
message. Therefore, multiple rejections SHOULD be permitted before
- acknowledging; allowing at least three attempts is recommended. A user
- agent SHOULD invoke the Soft Update algorithm for the service
- worker registration in response to each failure so that errors in scripts
- can be corrected; this invocation MAY include the force bypass cache
- flag.
+ acknowledging; allowing at least three attempts is recommended.