Capturing Browser Traffic With an HAR (HTTP Archive) For Troubleshooting

Environment

• Google Chrome
• Mozilla Firefox
• Microsoft Edge
• Microsoft Internet Explorer
• Opera Browser

Issue

• Need analysis on state of the chrome browser when reproducing an issue
• Need to send log of all web traffic for diagnostics
• How to collect data from web browsers to troubleshoot issues like performance, rendering, etc?
• How to create a HAR file to output browser traffic for diagnostics?

Resolution

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• The "HTTP Archive format" or HAR, is a JSON-formatted archive file format for logging of a web browser's interaction with a site. The common extension for these files is .har.

• Instructions to acquire a HAR file depend on web browser. Refer to its official documentation:

  • Content from developer.mozilla.org is not included.Mozilla Firefox
  • Content from support.google.com is not included.Google Chrome
    • If you need to capture traffic with cookies, please enable the "Allow to generate HAR with sensitive data" option in the Network section of the DevTools Settings screen before performing the capture.
  • Microsoft Edge
    1. Content from learn.microsoft.com is not included.Open the DevTools
    2. Content from learn.microsoft.com is not included.Save all network requests to a HAR file
  • Content from msdn.microsoft.com is not included.Microsoft Internet Explorer
  • Content from help.opera.com is not included.Opera Browser

NOTE: passwords may be visible in the HAR content file so please remove them before uploading. The HAR content will give a detailed view into what the browser sees

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