The HAR 'preserve log' option is not preserving the HAR data.

[Farooq Rahman]

I am dumping the HAR data using the API chrome.devtools.network.getHAR() with the preference network_log.preserve-log: true. I am dumping the HAR data for every onClick and page load event.

So basically for every dump I am capturing the HAR data right from the start to the present state with the option preserve-log.

Recently I updated my Chrome to version 125.0.6422.112 and Chromedriver to version 125.0.6422.78

After this update, when I am dumping the HAR data, I cannot get the HAR of previous pages. During the HAR dump I am having HAR data of the current page.

Has anything changed in the preserve-log option from this new version? or this is a regression?

Thanks.

[Farooq Rahman]

I have the solution for this problem, sharing it here so that anyone facing the issue can refer to the answer here.

I don't know from which version of Chrome this change happened but I found that from 125.0.6422.78 version the preference network_log.preserve-log changed to preference network-log.preserve-log. They replaced '_' with '-' in network-log.

After making the change the functionality is working fine.

Thanks.