1414243 - Windows opened via windows.create() with type "popup" show up blank

Status: RESOLVED DUPLICATE of bug 1408446

(WebExtensions :: General, defect)

Description

[Wladimir Palant]

Attachment: Minimal extension for testing

Extension windows opened via chrome.windows.create({type: "popup"}) will show up blank initially in the current Firefox nightlies. Right-clicking the page or resizing it makes the contents appear. Steps to reproduce:

1. Download the attached test extension.
2. Go to about:debugging
3. Click "Load Temporary Add-on" and choose the downloaded XPI file.

Expected results:

A new window opens with text saying "Window contents should be visible." This is what I get in Firefox 56.

Actual results:

The new window is blank. Right-clicking its contents or resizing makes the text appear. There are two potentially relevant error messages in Browser Console:

> TypeError: invalid 'in' operand browser     tabbrowser.xml:2479:1 (that's tabbrowser._insertBrowser)

> Error: Missing host permission for the tab     undefined

I reproduced that issue in Firefox 58.0a1 nightlies (2017-11-02 and 2017-10-02) on Ubuntu 17.10. Judging by the error message, bug 1389784 might be related.