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Questions, topic ideas, corrections or a tool that isn't behaving? We'd like to hear about it.

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Reporting a problem with a tool

Please include the page URL, what you expected, and what happened. For the HAR analyzer, do not email us the HAR file. Describe the problem instead, or use Download sanitized HAR first, because HAR files can contain session cookies and tokens.

Corrections

If a guide is wrong or out of date, send us a link to the page and what needs changing. Reader feedback keeps the content accurate.

Response time

We maintain this site alongside our day jobs, so replies may take a few days. Important issues get handled first.