Why does Firefox 4 hang CONSTANTLY?!

Firefox hangs constantly, anywhere from the initial load-up to 40 minutes into my browsing.It doesn't seem to be related to any particular site, but it seems to happen slightly more often while loading a video. I'm running windows 7 x64 on a Turion processor. I have to open task manager and end the Firefox process every time, and when I start it back up, sometims it displays the "Oops" screen, and sometimes it doesn't. I've always been a huge fan of firefox since the initial release, and I love everything about FF4 except this constant hanging, but this is unacceptable, and if this issue isn't fixed soon, I'll HAVE to jump ship.

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
Create a new profile as a test to check if your current profile is causing the problems. 
See [[Basic Troubleshooting#Make_a_new_profile|Basic Troubleshooting: Make a new profile]] 
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" 
If that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)
See http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

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Why does firefox 4 hang in some websites, during browsing on that site ? This never happened with previous editions.

why does firefox 4 hang in some websites, during browsing on that site ? This never happened with previous editions. edit
Details

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
Create a new profile as a test to check if your current profile is causing the problems. 
See [[Basic Troubleshooting#Make_a_new_profile|Basic Troubleshooting: Make a new profile]] 
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" 
If that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)
See http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Why does Firefox keep hanging, crashing, sulking, dying when internet connection behaves?

Why does Firefox keep hanging, crashing, sulking, dying when internet connection behaves? Once it renders the page it should forget about the page. Why does it behave when some link is clicked when there is no internet? It should just say internet not available or some crap. Why die, sulk, crash?? I don't get it! 3 series was much much much better!

I should add, I've re-downloaded Firefox, but that doesn't look like it has helped any. Still get seemingly inexplicable crashes.

Why does Firefox 8 hang every time I put my Mac to sleep?

I recently switched to Firefox 8 on Mac OS v10.6.8. If I put my laptop to sleep with Firefox running, when I open the computer again Firefox hangs. It's unresponsive to any mouseclicks or keystrokes.
I can force-quit Firefox and reopen it again, but it's annoying. I'm running on a new Macbook Pro, 2.3 GHz Intel core i7 with 8 GB RAM.

The work offline thing doesn't help.
There's a possibly related tab issue--sometimes if you push ctrl+t to open a new tab after waking from sleep mode, it'll open a blank tab and let you type in the URL bar, but it won't actually show a new tab in your tab bar. It's like a phantom tab or something. If you try to switch tabs, that's when it hangs. It also doesn't load the page fully, especially if there's flash content.
Other times, you can't even open a new "phantom tab", it won't accept any keystrokes. It seems that if you wait a couple minutes after waking from sleep and don't click anything Firefox is more likely to respond to keystrokes.
I haven't ever seen Firefox 8 behave normally after waking from sleep mode, no matter how long I wait. Firefox 7 was fine.

Why does Firefox keep hanging unexpectedly?

Hi,
I'm running 6.0.2 (Windows 7 x86) and it's frequently locking up for no apparent reason...
I've had this problem previously and at the time it was fixed by disabling hardware acceleration.
This option is still deactivated but the issue has since returned!
Help!
Brian

Why not ask in the iMovie forums of whichever version you are using? It's where the experts hang out at.

Why does firefox hang when opening and takes several minutes to come up?

Why does Firefox hang for several minutes before coming up?

I am also having this problem. When trying to reboot, I get an endless cycle of the BIOS screen, then "MACHINE ERROR", then back. Running the same dmesg command as snoxu results in a similar error message. I am forced to shutdown by holding the power button. Upon rebooting, I get an error message that all extensions have been turned off (using Gnome Shell). Then I have to logout and login.
Shutting down and then restarting works fine.
Additional info:
System76 Gazelle Professional laptop
syslinux, systemd, GDM, Gnome Shell

Why does Firefox hang when accessing SSL content on Oracle 10.3.6 WebLogic with JSSE enabled?

For several weeks we have been working with Oracle support to find out why our Firefox browser hangs for 20-30 seconds when connecting to SSL content on 10.3.6 WebLogic only when JSSE is enabled. It occurs when first attempting to connect to an enterprise WebLogic deployment. When JSSE is disabled the problem does not occur but JSSE must be enabled on WebLogic for our configuration. The problem also does 'not' occur when JSSE is enabled when using IE (8). In 10.3.5 WebLogic, the issue does not occur with Firefox but 10.3.6 is our preferred version and this is a major issue for us.
For the Firefox version, we used version 18 and 17 with no difference. Thanks for your help.

Hi,
I did remove the entry and restarted the managed server, but nodemanager added the option again.
Regarding startup.properties, it doesn't have any ssl configuration:
Server startup properties
#Fri Apr 24 11:54:54 CDT 2015
Arguments=-Xms1024m -Xmx1024m -XX\:UseConcMarkSweepGC -Djava.net.perferIPv4Stack\=false -Dweblogic.ssl.JSSEEnabled\=false
SSLArguments=-Dweblogic.security.SSL.ignoreHostnameVerification\=false -Dweblogic.ReverseDNSAllowed\=false
RestartMax=2
RestartDelaySeconds=0
RestartInterval=3600
AdminURL=http\://wlserver\:7001
AutoRestart=true
AutoKillIfFailed=false

Why does Firefox give this message when I do not have another program running "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system."

Question
why does Firefox give this message when I do not have another program running or another window open - "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system." edit

See also "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

Why does Firefox always block any link I try to open going to a web page when I don't have pop up blocker on?

Why does Firefox always block any link I try to open going to a web page when I don't have pop up blocker on? First off they are not even pop ups....your crap blocks everything and don't save user names &/or passwords when you have it checked. Also in your tutorials about solving this issue says it has the word "OPTION" .......no, it never says option to allow you to bypass it and etc. Only thing is says is "ALLOW" . That would be nice , but the problem is it will not allow it from then on. It only allows it right then and then you have to refresh...after that to open again it blocks it again.....HOW STUPID?!!!!!
It always say that this is preventing this page from automatically redirecting to another page. THIS IS WHAT I AM TRYING TO DO...GO TO ANOTHER PAGE........I DON'T NEED YOUr BROWSERS PERMISSION TO DO THAT. THAT IS WHAT A *%#$&*(&*%$$%% BROWSER IS FOR TO GO TO OTHER PAGES......THEY ARE NOT POP UPS!!!!!
YOU STUPID BROWSER ACTUALLY BLOCKS EVERYTHING AND THAT SUX!!!
HELP!!

Are you using "Clear history when Firefox closes"?
In case you are using "Clear history when Firefox closes":
*do not clear the Cookies
*do not clear the Site Preferences
*Tools > Options > Privacy > Firefox will: "Use custom settings for history": [X] "Clear history when Firefox closes" > Settings
*https://support.mozilla.org/kb/Clear+Recent+History
Note that clearing "Site Preferences" clears all exceptions for cookies, images, pop-up windows, software installation, and passwords.
Clearing cookies will remove all specified (selected) cookies including cookies with an allow exception that you want to keep.
Let all cookies expire when you close Firefox.
*Firefox/Tools > Options > Privacy > Cookies: Keep until: I close Firefox
You can choose to keep third-party cookies from visited sites if necessary.
Create a cookie 'allow' exception for cookies that you want to keep.
*Firefox/Tools > Options > Privacy > Cookies: Exceptions

Why does Firefox have to make it so difficult to get answers--I am not going to be able to check the website to see what anyone might reply to my question on crashing?

I have no way of checking to see if anyone answers this. Why does Firefox have to make it so difficult?
What does this means: DLL C:\Program Files\Mozilla Firefox\MOZCRT19.dll is not a valid Windows image. Please check this against your installation diskette.
Suddenly all my tabs closed. Then Windows told me I had a gazillion infections. Then a tiny strip appeared saying it was Firefox and these little blocks started to fill up the little strip as if it were downloading something--there was no way to cancel this so I cut the power. Now when I try to use the Firefox icon, I get the message above.
Am I supposed to remove the old Firefox stuff and start from scratch? I am stuck using Internet Explorer.
I went to the Firefox website and tried to download it again, but McAffee jumped in and said there is something wrong with Firefox and I should register with them that I am downloading Firefox (I do not have McAffee). Then I got a security warning saying Firefox is not safe.
I am completely at a loss as to what to do next, since I don't understand any of this mumbojumbo.

Here's the story on one of your infections, namely JS:Redirector-EH[Trj]: http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan%3aJS%2fRedirector.H
The main problem with malware is that it uses the installation to proliferate by contacting hostile servers to download more of the same rogue code.
Firefox doesn't have the option to "Run" a file. You can only "Save File" or "Cancel". If you downloaded it with IE8, then yes, you can run it, but that's not what I wanted you to do.
What you should do now is to disable System Restore. You can open System Properties by hitting the Windows logo key and Pause/Break key together. Then click the "System Restore" tab. Then checkmark the box which says "''Turn off System Restore on all drives''". Reboot to clear its contents. System Restore unfortunately makes a backup of all executables which includes viruses so that when you reboot without deleting them first, System Restore reinstates them again.
After you complete that step, run Avast and Malwarebytes again to make sure the system is clean.
Then go to the Windows Update site (link on your start menu) and install the missing patches which enabled your machine to become infected in the first place.
Once the system is clean, repeat step one to download Firefox again, but please do not run the file. If you don't see the option to "Save File", cancel the download, but it should be there. You can use this direct download link to download FF4.0.1 [http://www.mozilla.com/products/download.html?product=firefox-4.0.1&os=win&lang=en-US Download Firefox 4.0.1]
Run the file after you download it to the desktop.

Why does firefox show up as a plugin on volume mixer?

Why does firefox show up as a plugin on volume mixer? After updating a flash plugin into firefox (when it had requested me to update it), it no longer shows up as firefox in volume mixer. It now shows up as some plugin icon. I really don't understand this, and wish it to be the firefox icon again. What is going on and what happened? It names itself "Plugin Container For Firefox" What does that mean? It has been this way ever since, and nothing I have done has fixed this. Restarting, refreshing, reinstalling, clearing cache, etc. Can anyone think of something please? :(
== This happened ==
Every time Firefox opened
== This happened just a couple days ago (june 25, 2010 exactly)

I have this, but my volume on firefox doesnt work at all

Why does FireFox change layout/settings during upgrades without asking ?

Just upgraded to Firefox 18 (windows 7 desktop). Why does Firefox change layouts/settings without asking the user if he wants it or not???
I am getting sick of those changes. I want to have at the google main page the options (as before) to search in all languages, or pages from a certain language or pages in a certain language (of course depening of the google address; f.i. at google.de for german languages, google.fr for french languages etc).
In the latest Firefox 17 it was working as I wanted and described before: when I visited www.google.de/firefox of www.google.fr/firefox. Now those 3 options (under the search bar) are gone and I do not want to operate by clicking on the advanced search button. Those things should be visible under the search bar again.
Also my STARTPAGE was GONE/DELETED after the update !!! Grrrrr.... Updating is OK but mozilla should not change user configured items !!!!!!!
The above described problem has nothing to do with the google website.

By the way, do Firefox and IE use the same proxy settings? You can view Firefox's here:
orange Firefox button (or Tools menu) > Options > Advanced > "Network" mini-tab > "Settings" button
The default is "Use system proxy settings".

Why does FireFox open as a very small box in the top l/h corner and i have to resize it every time

Why does FireFox open as a very small box in the top l/h corner and i have to resize it every time this only occurs on the initial opening up of F/Fx after boot-up

Open the system menu via Alt+Space and see if you can resize that window. 
If that works then close Firefox (File > Exit/Quit) to save that setting.
See also:
* http://kb.mozillazine.org/Resizing_oversize_window
If the above didn't help then see:
* http://kb.mozillazine.org/Corrupt_localstore.rdf

Why does firefox autostart when I switch computer on

why does firefox autostart when I switch computer on

[[Firefox launches automatically when your computer starts]]
If you have nothing Firefox related in your startup folder,
Your issue may be caused by Malware. You can run and update the following '''free''' anti virus software:
1. Malwarebytes (Free version) - http://www.malwarebytes.org
2. Spybot Search & Destroy - http://www.safer-networking.org
3.Spyware Terminator - http://www.spywareterminator.com
In addition, there are a number of forums you can use to help get rid of your infection. These include:
*[http://www.bleepingcomputer.com/forums/ Bleeping Computer]
*[http://forums.spybot.info/ Safer-Networking Forums]
*[http://www.spywarewarrior.com/index.php Spyware Warrior Forums]
*[http://www.spywarewarrior.com/index.php SpywareInfo Forums]

Why does Firefox sometimes ask me if I want to save my tabs when I close, and sometimes it does not? I usually want to save them, so this is a pain. I'm on a Mac, OS 10.5.8

Why does Firefox sometimes ask me if I want to save my tabs when I close, and sometimes it does not? I usually want to save them, so this is a pain. I'm on a Mac, OS 10.5.8
== This happened ==
A few times a week
== don't know...

There can be various causes for this:
[[Firefox does not ask to save tabs and windows on exit]]

Why does Firefox 4 hang CONSTANTLY?!

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