When you hit an issue with web push, it can be difficult to debug the issue or find help. This doc outlines some of the common issues and what you should do if you've found a bug in Chrome or Firefox. There are two distinct stages to check off when developing and testing web push. Each with its own set of common issues / problems.
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Authorization IssuesHTTP Status CodesPayload Encryption IssueConnection IssueRaising Bug ReportsFeedbackSort: