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Bug 269776

Summary:	Launching Firefox from IDE causes FF to freeze after some time of use
Product:	ide	Reporter:	riksoft <riksoft>
Component:	Extbrowser	Assignee:	Jan Stola <jstola>
Status:	NEW ---
Severity:	normal
Priority:	P3
Version:	8.2
Hardware:	PC
OS:	Linux
Issue Type:	DEFECT	Exception Reporter:

Description riksoft 2017-02-08 10:47:49 UTC

=== AMBIENT:
Product Version: NetBeans IDE 8.2 (Build 201609300101)
Java: 1.8.0_121; OpenJDK 64-Bit Server VM 25.121-b13
Runtime: OpenJDK Runtime Environment 1.8.0_121-8u121-b13-0ubuntu1.16.04.2-b13
System: Linux version 4.4.0-62-generic running on amd64; UTF-8; en_GB (nb)

Mint 18 Mate 64b

Firefox Developer Edition (alpha channel by default).
In this very moment is 53.0a2 (2017-02-07) (64-bit), but previously I used to use the standard version of Firefox and I had the same problem, so it doesn't depend on the Firefox version. 

=== PROBLEM:
I uses SHIFT+F6 a lot to run .php files in my web projects, but it has the side effect that after some time of use, Firefox becomes unresponsive, almost frozen (reply to a click after 30s), and the only solution is to close it and reopen. 

This used to happen also on previous versions of Netbeans/Firefox/OS but I blamed Firefox because I didn't notice that it happens only when Netbeans launches Firefox.

I've now also discovered, as a further confirmation, that another option to unfreeze Firefox is to close Netbeans and in that very moment Firefox turns back to life.

I cannot give a procedure to reproduce the problem at will, but tipically it appears to happen most of the time when toggling  F12 (developer console) and CTRL+SHIFT+M (responsive mode).