There is a beginning of solution for popups in Firefox DevTools.
You can toggle `devtools.popups.debug` preference [1] to true in about:config
and DevTools should open on popups.
Unfortunately, there is some limitations, highlighted at the end of that bugzilla entry. It won't work for <a target="_blank">, while it should work for window.open usages.
You can toggle `devtools.popups.debug` preference [1] to true in about:config and DevTools should open on popups.
Unfortunately, there is some limitations, highlighted at the end of that bugzilla entry. It won't work for <a target="_blank">, while it should work for window.open usages.
[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1569859