Weird behaviour in har file generation

[talwararjun4]

For every page that is navigated to, 2 har files are getting generated.

The only difference in the 2 files is that some extra information related to page timings is present in the second har file. (Extra information present in the second har file - "cache": {}, "timings": {},"content": {
"mimeType": "image/png", "size": -1, "comment": "Response bodies are not included." },
"redirectURL": "", "headersSize": 372, "bodySize": 351} etc. )

Attached are a set a har files that got generated for 1 page navigation.

HarOutputDir.zip

is this expected ? should i discard the first har file for each page always ?

Im using firefox 43 and har_export_trigger-0.5.0-beta.7-fx