1950380 - Inspector / Save all as HAR doesn't work above 1.2 Gb

Status: UNCONFIRMED

(DevTools :: Netmonitor, defect, P4)

Description

[devnull]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

Steps to reproduce:

Under Mac OS 23E224 on Apple Silicon, Firefox 135 :

1. Go to about:config, modify the key devtools.netmonitor.responseBodyLimit to value 0.
2. Open the inspector
3. Go to https://www.instagram.com/ or any page with an infinite scroll and a lot of images/requests/videos
4. Scroll down to have more than 1.2Gb transferred
5. Click on the wrench / Save all as HAR

Actual results:

I get an empty HAR file

Expected results:

I should get all the data in the HAR file

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'DevTools::Netmonitor' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Nicolas Chevobbe [:nchevobbe]]

Hello devnull,

Are you seeing anything in the Browser Console (https://firefox-source-docs.mozilla.org/devtools-user/browser_console/index.html) ?
Also, I'm curious what you're trying to do here? 1Gb seems quite huge and I don't think we had such case in mind when designing the HAR file exporter.