This guide is based on the excellent guide made and maintained by Zendesk here:
This will simply be an outline of how it can be retrieved from most browsers. If you want detailed instructions based on your browser, please visit the URL above.
As Zendesk puts it in their guide:
When troubleshooting complex issues, it is sometimes necessary for our customer service team to obtain additional information about the network requests that are generated in your browser while an issue occurs. A customer service team member may request that you record a HAR file, or a log of network requests, while that issue is occurring and then provide that to them for further analysis.
The principle, that applies to all browsers is as follows:
- Open the Developer menu (right click on the page "Inspect", or press F12, or through the Tools menu)
- Go to the Network Tab in the Developer Panel/Window
- (Ideally) Clear logs
- Perform the same actions to reproduce the issue
- Right-click anywhere in the Network tab and click "Save as HAR"
- Send over the file