Firefox does not always quit properly, leaves gui-less process running macos



Plugins Graveyard
Java (Oracle)
6 years ago
2 years ago


(Reporter: Jørgen Nørgaard, Unassigned)


Mac OS X



(2 attachments)



6 years ago
Created attachment 708258 [details]
Sample of firefox.txt

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:19.0) Gecko/20100101 Firefox/19.0
Build ID: 20130123083802

Steps to reproduce:

Started firefox, probably failed loading java applet (latest 7u11 java from Oracle). Force quit and restart Firefox.

Seemed to work. Quit Firefox normally.

Sample from the activity viewer attached.

Actual results:

Noticed 100% cpu load and found running firefox process with no gui.

Expected results:

Should have exited.


6 years ago
Hardware: x86 → x86_64

Comment 1

6 years ago
Mac OS X 10.8.2

java applet plug-in java update 11
Component: Untriaged → Java (Oracle)
Product: Firefox → Plugins
Version: 19 Branch → 7.x

Comment 2

5 years ago
Created attachment 737129 [details]
Process sample of hanging firefox

Comment 3

5 years ago
Still happens with Firefox (21.0), checked for update and then quit (with cmd-q).

Left Firefox hanging, process not responding in Activity Viewer. No Java involved.

Process sample attached.
Unable to reproduce any hang on FF 21b2, j7u17 installed.
Firefox quit normally with opened.

Please check if the issue occurs using Firefox in safe mode (with addons disabled):

Or on a new, empty profile (Don't install any addons into it)

Comment 5

2 years ago
Closing old bugs in the Plugins component. We aren't going to track issues in 3rd-party plugins in the Mozilla bug tracker. In addition, support for NPAPI plugins will be removed at the end of this year; for more details see the post at

If there is a serious bug in Firefox, it needs to be filed in the "Core" product, "Plug-Ins" component.
Last Resolved: 2 years ago
Resolution: --- → INCOMPLETE


2 years ago
Product: Plugins → Plugins Graveyard
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