1430711 - Toolbox starts blank when clicking debug button at the first time in about:debugging

Status: NEW

(DevTools :: about:debugging, defect, P3)

Description

[magicp]

Attachment: steps-to-reproduce_20180116_150207.mp4

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0 ID:20180115100056

Steps to reproduce:
1. Launch Nightly on Windows
2. Go to about:debugging
3. Enable add-on debugging
4. Click "Debug" button of Activity Stream

Actual results:
Toolbox starts blank. The following error is logged in the browser console.

error occurred while processing 'attach: Error: Permission denied to access property "document"Line: 0, column: 0  main.js:1651
	_unknownError resource://devtools/server/main.js:1651:5
	onPacket resource://devtools/server/main.js:1790:29
	_onJSONObjectReady/< resource://devtools/shared/transport/transport.js:483:11
	exports.makeInfallible/< resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14
	exports.makeInfallible/< resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14


Regression range:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=c91659401a6d62f271bbc133f7c1d44fc455fb10&tochange=3e06cba872427866b195b98c51bca5883f166011


Expected results:
Toolbox works fine without error.

Comment 1

[Julian Descottes [:jdescottes]]

I can't reproduce the problem on Windows 7 with Firefox 59 using a clear profile at the moment.

Comment 2

[Patrick Brosset <:pbro>]

I tested on Windows 10 just now, on Nightly 59 (59.0a1 (2018-01-15)), and couldn't reproduce the problem either.
This is with my usual dev profile.

Comment 3

[magicp]

My environments are Windows 7, 8.1 and 10. In the attached video, I am using mozregression on Windows 10.

Comment 4

[Julian Descottes [:jdescottes]]

As we can't reproduce so far, we need more information.

magicp: Do you reproduce the error consistently? Are you using a clean profile for your tests?

Comment 5

[magicp]

(In reply to Julian Descottes [:jdescottes][:julian] from comment #4)
> magicp: Do you reproduce the error consistently? 
Yes, I do.

> Are you using a clean profile for your tests?
I am using a clean profile for my test. Also mozregression use a new profile by default.

Comment 6

[Oriol Brufau [:Oriol]]

I can reproduce too. But it must be Activity Stream or some native extension, debugging an installed webextension seems to work properly.