Java apps causes Firefox to hang, Firefox's or Java's fault?

Recently I've had serious issues with websites using Java, all of them causes Firefox to promptly freeze and I have to restart the browser. I can't enter any site that uses Java with the Java Platform enabled. I have tried reinstalling Java and different versions, along with any suggestions I could find in Firefox's and Java's FAQs, but so far nothing has worked.

skunktrader wrote:Maybe it isn't hanging, there might just be a very long timeout waiting for an ipv6 response
At first I thought that couldn't be the problem because it is a long timeout, but then I thought about it and realized that I've seen TCP/IP timeouts that are very long when the receiving party never replies to any packets.
I immediately looked at my firewall and saw that I have
ip6tables -P INPUT DROP
in my firewall script at start-up. Since I don't use IPv6, I decided to effectively disable it a year or so ago. I removed this iptables rule and Java applets work again. Furthermore, if I let the applet just sit for about 5 minutes (literally), the applet will run. I guess I never let it sit for that long before, although it did feel like I gave it enough time. So the problem does appear to be an IPv6-related timeout. Good call.
I had this iptables rule above the rule that accepts all connections on the local interface, so it's possible that I simply need to accept all local interface packets (and only drop foreign IPv6 packets) to fix the problem.
I don't know why my interface needs to receive any IPv6 packets for the Java applet to work, but it does. I'll get a packet sniffer out later today and see if I can make better sense out of what is happening.
dschrute: Do have have anything similar in your IPv6 configuration? Possibly another iptables IPv6 rule? I wonder if your problem is also caused by IPv6 not responding.
Last edited by B-Con (2011-05-09 21:13:23)

Similar Messages

Java Swing apps cause Windows 2K to hang

I have an IBM clone machine running a P4 and Windows 2k that hangs whenever I try to exit out of a window in a Java swing app. Whether the window is the main application window or a menu window instantiated by the application to be a child of the main window, does not matter. It hangs regardless. I have tried multithreaded apps and they do not cause my windows machine to hang. Neither do simple swing apps. But any multithreaded swing app causes it to hang. JEdit causes it. Forte causes it. I am running Java 1.4.1. Thanks for any help in this.

Freezes under Java 1.4.1 with Windows
Posted on Dec 14, 2002 - 02:57 PM by slava
Installation This is turning into a FAQ, so I thought I'd post it on the community site. A lot of people have complained that jEdit can hard freeze their windows system after upgrading to Java 1.4.1. If you experience this, the problem is not with jEdit, but with your video driver. Updating the driver to the latest version should solve the problem; downgrading to Java 1.4.0 might also work.
http://community.jedit.org/modules.php?op=modload&name=news&file=article&sid=190&mode=thread&order=0&thold=0

Sites using flash/shockwave cause Firefox to hang.

If the shockwave flash plugin is enabled on version >22, visiting a site that contains flash content will cause Firefox to hang/react extremely slowly. I've tried disabling all add-ons with no effect.
I'm using shockwave flash 11.2.r202.310 but it doesn't seem to matter when version of flash I use.

Thanks for the replies guys.
ComputerWhiz: No firewall or AV installed on my laptop.
cor-el: Nothing works. It is the shockwave flash plugin + >=v23 that is the problem. I've tried safemode, I've completely deleted everything eg moving the .mozilla directory and started a virgin firefox with the same results.

I have Kaspersky anti-virus for mac. The extension Kaspersky URL Advison 8.0.6 causes Firefox to hang when visiting secure websites, especially when the secure site redirects to another site.

Kaspersky URL Advisor 8.0.6 causes Firefox 9.0.1 to hang when visiting secure websites and will not allow a redirect to another site. banking sites, facebook, auctionsniper, all these are affected.

Please also contact Kaspersky Tech support and Forum and let them know the issue, if its really a bug, they will fix it through patch via database update
* https://my.kaspersky.com/en/support/helpdesk
* http://forum.kaspersky.com/index.php?showforum=117

[svn] 3913: BLZ-272 Two long polling endpoints not working in same app with Firefox

Revision: 3913
Author: [email protected]
Date: 2008-10-27 13:49:02 -0700 (Mon, 27 Oct 2008)
Log Message:
BLZ-272 Two long polling endpoints not working in same app with Firefox
The long polling waitMonitor object in the FlexSession did not keep track of
blocking polls via endpoint ID. This prevented the second channel from blocking.
Enhance the FlexSession.waitMonitor to be a map of endpointID to
EndpointQueue objects, and keep track of the monitors based on what endpoint
they are associated with.
QA: Yes
Doc:No
Checkintests: passed
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-272
Modified Paths:
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/FlexSession.java
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/client/FlexClient.java

Revision: 3913
Author: [email protected]
Date: 2008-10-27 13:49:02 -0700 (Mon, 27 Oct 2008)
Log Message:
BLZ-272 Two long polling endpoints not working in same app with Firefox
The long polling waitMonitor object in the FlexSession did not keep track of
blocking polls via endpoint ID. This prevented the second channel from blocking.
Enhance the FlexSession.waitMonitor to be a map of endpointID to
EndpointQueue objects, and keep track of the monitors based on what endpoint
they are associated with.
QA: Yes
Doc:No
Checkintests: passed
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-272
Modified Paths:
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/FlexSession.java
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/client/FlexClient.java

Ebay sidebar causes firefox to keep freezing in windows 7

Ebay sidebar causes Firefox 3.6.6 to keep hanging.disable it and firefox works ok!!
== This happened ==
Every time Firefox opened

hello, it does work without a problem for me (& i think the feature should be entirely handled by the OS, so the version of firefox shouldn't play any role in it). can you try to replicate this behaviour when you launch firefox in safe mode once?
[[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]

Is it possible to create a shortcut to a website which will cause firefox to open in fullscreen

I am wondering if it is possible to create a windows shortcut which will not only open a specific website in firefox but also cause firefox to open in fullscreen (F11), for that session only.
Can it be done?
Any help would be much appreciated.

long press your home screenand select "shortcut." IF you can do it then the "documents to go document" will be an option. some apps i have allow for such shortcuts (scanner radio favorite stations, etc) but most do not. if i had to guess, i will say no. but i don't have docs to go. i know pdf viewer doesn't do this. you can add folders, so maybe that would be an option? you'd still have to touch the phone at least twice though.

Shockwave flash causes firefox 4 crash

shockwave flash causes firefox 4 hangs. it happens whether using the latest or the previous version of flash. removing flash solves the problem but removing flash is not a solution. this happens on a computer with Windows 7. However on another computer with XP this does not happen.

#Download a copy of Flash from http://get.adobe.com/flashplayer/ and save it to your desktop.
#Then download the [http://kb2.adobe.com/cps/141/tn_14157.html Flash Uninstaller]
#Close Firefox via File | Exit
#Run the uninstaller to remove Flash from Firefox. It will also remove it from IE.
#Reboot
#Run the Flash installer you downloaded to your desktop earlier (do not start Firefox). This will install it on Firefox only.
#Open IE and go to http://get.adobe.com/flashplayer/ and choose Run when you see the prompt.
#Test the installation in both Firefox and IE by going to: http://www.adobe.com/software/flash/about/

Finder crashes with OS 10.6.8. With or without any apps running finder will hang repeatedly causing the iMac to hang also. I upgraded from 10.5.8 to 10.6.8 recently and finder was OK for 1 week. How do I submit a crash log?

Folllowing an upgrade from 10.5.8 to 10.6.8 (Snow Leopard) Finder frequently hangs, causing any open apps and the iMac to hang. This will occur whether or not any 3rd party apps or Safari are open. About 50% of the time trying to empty the trash will cause a finder hang. There are no error messages to let me know what code such a hang may be. Repeated attempts to force quit the iMac always fail, so I have to hard crash using the power button. Multiple attempts are required to successfully restart via the login screen. I do not know whether any other apps, such as Safari or screen saver may be involved. I think a crash log would help, however I am not sure whether I should look in: useres/library/logs/DaiagnosticReports or : users/library/logs/CrashReporter, and whether I should attempt to open the latest in either in Console or Text edit and then post here. Also, is this the appropriate site to post a log in the hope that Apple may look at it? I have read through threads on Apple finder, and am stunned to find that after all these OS-X versions finder is still buggy and inferior to MS Explorer and Apple appears to be in denial. Maybe their efforts are in devices such as iPhones and iPads? Ths issue never occured in OS 10.5.8.

Better is http://www.apple.com/feedback/macosx.html

I keep getting notices from Firefox (Firefox emblem in the popup) that "Joe Smith has Unfriended" me. I cannot find this app in Firefox to remove it. Mac OS

Firefox 28.0 Mac OS 10.9.2
I keep getting small pop-up notices from Firefox (Firefox emblem in the pop-up), telling me that "Joe Smith [insert name of one of my Facebook friends there] has Unfriended you." It only stays on the screen for a few seconds and disappears.
Oddly, none of these people have actually unfriended me in Facebook. Facebook does not send Unfriend notices. I know there is an app for Firefox that does this, but I cannot find any trace of it in my Firefox Applications list and I do not recall installing it. Nothing with "Facebook" or "Unfriend" in my Firefox app list. (Someone else in the household may have installed it, but they are not talking. ;)
I searched my hard drive for "unfriend" and "Unfriend" and found nothing.
At this point, it is an annoyance, but it bothers me that something like this could become malicious.
Any help would be greatly appreciated. Thanks for your time.

You have an add-on called Lost Friends Notifier. That seems like the likely culprit. Try removing it from the Add-ons Manager, Extensions category.
* [[Disable or remove Add-ons]]

I installed Firefox sync and then used iphone app called FireFox Home and I can syncronize history, tabs and bookmarks. But I am NOT able to syncronize passwords from Firefox in my Macbook to FireFox Home on iPhone !

I installed Firefox sync and then used iphone app called FireFox Home and I can syncronize history, tabs and bookmarks. But I am NOT able to syncronize passwords from Firefox in my Macbook to FireFox Home on iPhone so I am very terrible to input my IDs and Passwords with my hands on FireFox Home when I log into Facebook, Twitter etc... Is it issue or something like that? If you have some solutions to make it clear, can you tell me how to syncronize memorized IDs and Passwords for the webs. Thank you.

You can look in Tools > Options > Sync
Menu differences: [http://kb.mozillazine.org/Menu_differences Windows: Tools > Options - Mac: Firefox > Preferences - Linux: Edit > Preferences]
See also:
* [[What is Firefox Sync]]
* [[How to sync Firefox settings between computers]]
* [[How to sync Firefox between my desktop and mobile]]

Being in a Skype call causes Firefox to not load videos or audio files such as pandora songs or youtube videos.

I have already talked with a Skype representative and they said to come talk to you. I do not have this problem with IE or other browsers. I already tried reinstalling firefox and reinstalling skype, neither of which was effective. It is really annoying because depending on luck of the draw I will have to refresh a video 10 or more times to not receive and error.

This is not a problem with Skype. The Skype program will take a lot of internet usage and CPU to run on your computer. This may cause Firefox to run slow and/or not function correctly.
You can try these things, but I don't think that it will help:
# Try Firefox in [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode?esab=a&s=safe+mode&r=1&as=s Safe Mode]
# Update to the most recent version of Firefox <i>(Firefox 23.0)</i>
Have you ever been able to run Skype and Firefox before?

Certain websited cause Firefox to terminate. What can I do to fix this? Thanks

Certain web sites, when I navigate to them, cause Firefox to terminate. I have had problems with MSN and also CNN, and a newspaper site? What causes this and how can I remedy this? Thank you.

I think it is Adobe Reader XI and I have Windows 8. It has happened with a couple different PDF files. I have experienced the problem when trying to use the "draw a circle" tool as well as the "add text callout" - I have drawn some circles without a problem. Sometimes what happens is I try to draw the circle (or the other one), and nothing happens, it is as if the page doesn't realize I clicked or dragged the mouse. Then when I try clicking somewhere else in Adobe Reader it is frozen/"not responding" and I have to force close the program. When I open it again it tries to restore the changes that I had made since the last time I saved but it doesn't always recover it. I have not tried the repair option - what is that?

Closing a pop-up causes Firefox to prompt me to save my tabs.

When browsing any website that has pop-ups as part of its design (for example, clicking on an image thumbnail on eBay causes a larger version to be shown in a new window), closing the pop-up causes Firefox to prompt me with, "Do you want Firefox to save your tabs for the next time it starts?" even though I'm only trying to close that single pop-up window and not all of my tabs.

It seems that Microsoft's HTML5 video plugin was the culprit, or at least contributed to it. I will update with more information if needed. Otherwise, this issue is solved.

I have dwnlded the app weather Firefox n it is not opening up.

App weather Firefox is not opening up.

Hi MadMohan,
Thank you for your question. The add on should be visible here [about:addons] or [about:apps] if not please make sure the app that was downloaded is compatible with Firefox.

Java apps causes Firefox to hang, Firefox's or Java's fault?

Similar Messages

Maybe you are looking for