The HTTP archive format, or HAR, is a JSON-formatted archive file format for logging a browser’s interaction with a site. The extension for this kind of file is .har.
To export a .har file
Right-click anywhere in PageProf and select Inspect.
In the developer tools, click Network – ensure Preserve Log is ticked, and you are recording (the red dot on the left hand side is on).
Refresh your PageProof screen, and perform the action again that you wish to report to the PageProof team.
You should see the developer tools window registering the logs. Right-click on the logs and select Save all as HAR with content.