1243511 - Unable to upload files from within Flash on FireFox 44 64-bit (32-bit works)

Status: RESOLVED DUPLICATE of bug 1236911

(Core Graveyard :: Plug-ins, defect)

Description

[ffdixon]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.82 Safari/537.36

Steps to reproduce:

Using FireFox 44 64-bit on Windows 10 we reproduced this bug on two sites:

Method #1:

1.  Visit TWG Flash Uploader Demo

  http://www.tinywebgallery.com/en/tfu/web_demo1.php

2 Click "Add files" button (No File Upload dialog appears)


Method #2: Use BigBlueButton

1. Join BigBlueButton session at

  http://demo.bigbluebutton.org/

2.  Enter your name and click "Join" button

3. Click the icon to the left of your name in Users list to make yourself Presenter 

4. Click the "Upload Presentation" button (lower-left of Presentation area).

5.  Click "Select File" button (No File Upload appears)



Actual results:

In both cases, the Windows File Upload dialog did not appear.




Expected results:

In both cases, the Windows File Upload dialog *should* have appeared.

For comparison, the file upload dialog appears when testing with

  - FireFox 44 32-bit on Windows 10.
  - Chrome 44 64-bit on Windows 10.

We did a short video to demonstrate the issue

  https://youtu.be/tbDFgxY_x0I


The impact of this issue is any instructor running FireFox 64-bit on Windows 10 will suddenly be unable to upload their presentation within BigBlueButton.  :-(

Hoping this could be a quick fix.

Comment 1

[Makoto Kato [:m_kato]]

I guess that this is our sandbox issue.  Flash calls GetOpenFileNameW, but it returns FALSE immediately.

Comment 2

[Bob Owen (:bobowen)]

Thanks for reporting.

This appears to be the same as bug 1236911, it looks like Flash Player tries to use an HWND from our parent process, which it doesn't have access to.