The work is ready to be used and we need more feedback to polish it and identify potential blockers. Enabling it for Nightly and Beta will help with that.

https://hg.mozilla.org/mozilla-central/rev/19cf8e37f286

Since this won't be enabled in release till later on, we won't document this for now.

Chris, just saw this. Since this is coming to 71, when should we add a tag?

(In reply to :Harald Kirschner :digitarald from comment #6)

Chris, just saw this. Since this is coming to 71, when should we add a tag?

Let's do this; I've added it to the current sprint: https://github.com/mdn/sprints/issues/2276

Documentation complete for this one — see https://github.com/mdn/sprints/issues/2276#issuecomment-559217535 for the full details. Let me know if you think this needs anything else; thanks!

This feature is currently seemingly impossible to disable. Navigating through history and having screenshot and restart commands execute by default is annoying. Setting devtools.debugger.features.inline-preview to false has no effect. On 74.0b9.

rctgamer3, you probably experience issues with instant evaluation, bug 1460518. It can be disabled in the Console's settings menu (labeled "Eager Evaluation" in DevEd 74).

Do you have specific commands that were executed that caused side effects? A lot of work landed in 75, so I want to make sure we got those covered.

Yes, this is indeed about instant/eager evaluation, though there's no setting for this visible in Firefox 74. Thanks, I'll check out the meta bug.