1777579 - Screenshots of an area of Firefox View aren't working

Status: RESOLVED DUPLICATE of bug 1786558

(Firefox :: Screenshots, defect, P3)

Description

[Sam Foster [:sfoster] (he/him)]

If you enable the browser.tabs.firefox-view in Nightly you can open Firefox View using the new button to the left of your tabs on the toolbar.

Triggering the screenshot capture from here (using screenshots.browser.component.enabled=true) only partly works: the "full page / visible page" toolbar shows up and those buttons work, but its not possible to drag to select a capture area.

Firefox View loads about:firefoxview into a hidden tab, which I suspect is relevant here.

Comment 1

[Sam Foster [:sfoster] (he/him)]

There's a logged exception when you try to reproduce:

SecurityError: Node.appendChild: Adopting nodes across docgroups in chrome documents is unsupported

from ScreenshotsOverlayChild.jsm#332 which is where we add the constructed documentFragment to the anonymous content document.

Comment 2

[Sam Foster [:sfoster] (he/him)]

I think this is a dupe as I can't reproduce right now, but it should block enabling on Nightly either way.