You can export to HAR (HTTP-Archive) in the Network Monitor. *https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor *https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor/toolbar See also: *https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/network/getHAR ---- *http://www.softwareishard.com/blog/har-viewer/ *http://www.softwareishard.com/har/viewer/