Har Files in Chrome

Today I learned about the .har extension (via Wikipedia):

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.

In Chrome DevTools’ network tab you can export a .har file with your current browser’s interaction. And that same extension can be uploaded back into the network tab. It’s an information-rich way to communicate what you see in the network tab.