thib Reporter
	Description • 8 years ago

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0
Build ID: 20161013141419

Steps to reproduce:

I can't view source code via :


- the "right click" > "View Page Source"

- "menu" > "Dévelopement" tools > "View Page Source"

- Ctlr+U 


I am using Firefox 50.0b5 under windows 7. Other technical info can be found here :
https://support.mozilla.org/en-US/questions/1142404


Actual results:

A new tab is opened : 

- A loading spinner is shown few seconds (< 2 s) with a light grey background
- Then the loading spinner disappear and the background change to white
- There is nothing in the address bar


The only way that works for viewing source code is to type view-source:<website> in the address bar. 


Expected results:

The new opened tab should have shown the source code of a web page

	thib Reporter
	Comment 1 • 8 years ago

The bug can't be reproduced in a new Firefox profile

	thib Reporter
	Comment 2 • 8 years ago

about:support page

	thib Reporter
	Comment 3 • 8 years ago

Additional information :

Source code of "about:" pages can be viewed using :

- the "right click" > "View Page Source"
- "menu" > "Dévelopement" tools > "View Page Source"
- Ctlr+U

	Tooru Fujisawa [:arai]
	Comment 4 • 8 years ago

If the issue doesn't happen on new profile, it would be an issue from one of your extension.
try disabling all of them and see if the issue happens.
if the issue doesn't happen if you disable all of them, try enabling one by one to see which one caused the issue.

	thib Reporter
	Comment 5 • 8 years ago

I disabled all extensions. The issue remains

	Tooru Fujisawa [:arai]
	Comment 6 • 8 years ago

just to be sure, have you restarted Firefox after disabling all your extensions?

Does the issue happen on safe mode?

Also, if the issue happens, do you see any error message in "Browser Console" ?

	thib Reporter
	Comment 7 • 8 years ago

Yes, I restarted firefox after disabling all extensions. The issue happen also on safe mode.

If extensions are not disabled, the browser console show :
unsafe/forbidden CPOW usage  RemoteAddonsParent.jsm:882:2
unsafe/forbidden CPOW usage warning.js:742:18
unsafe/forbidden CPOW usage  RemoteAddonsParent.jsm:882:2
unsafe/forbidden CPOW usage warning.js:742:18
unsafe/forbidden CPOW usage  RemoteAddonsParent.jsm:882:2
unsafe/forbidden CPOW usage warning.js:742:18
unsafe/forbidden CPOW usage  RemoteAddonsParent.jsm:882:2
unsafe/forbidden CPOW usage warning.js:742:18
TypeError: contentWindow is null  viewSource-content.js:227:11
Use of nsIFile in content process is deprecated.

If extensions are disabled, the browser console show :
TypeError: contentWindow is null  viewSource-content.js:227:11

Runing in safe mode, the browser console show :
TypeError: contentWindow is null  viewSource-content.js:227:11

	Tooru Fujisawa [:arai]
	Comment 8 • 8 years ago

Can you open about:support and click "Copy raw data to clipboard", and paste it to file, and attach here, on the following configurations?
  * new profile (after confirming View Source works)
  * your existing profile (after confirming View Source doesn't work)

	thib Reporter
	Comment 9 • 8 years ago

RAW about:support of the "Default" profile, on which view source code isn't working as described in this bug support

	thib Reporter
	Comment 10 • 8 years ago

RAW about:support of a new profile, on which "view source code" is working

	Tooru Fujisawa [:arai]
	Comment 11 • 8 years ago

So, you have the following configuration, and it causes the issue.

  user_pref("dom.ipc.processCount", 16);

it hits bug 1165309, that is fixed in Firefox 51.
If you're going to keep using Firefox 50, please reset the configuration.

	thib Reporter
	Comment 12 • 8 years ago

Thanks for your help