Firefox (3.6.10) is very sluggish/slow and hangs up

All of a sudden Firefox (3.6.10) is very sluggish/slow and hangs up
I've been using Firefox (very actively) for over a year now and all of a sudden (yesterday) it began to act very sluggishly. On sites I have always visited frequently it hangs up for periods of 15-90 seconds or more, won't scroll down, won't open hot links, slowly opens new tabs ...
I rebooted my PC (multiple times), powered down my modem and router, ran a Norton disk optimization - essentially making sure it was not an outside factor effecting Firefox's performance. (Note: I am using a cable connection.)
I then ran a side by side speed comparison with Internet explorer (on my 2nd monitor) going to the same web sites, and IE had no problems/hang-ups.
FYI I only have a couple of add ins/extensions (Java, Microsoft Framework, Norton, No Squint, & RealPlayer) and none of those are new within the past few weeks at least.
Any ideas on what could be causing this? How to fix? (As I much prefer Firefox to any Microsoft product.)
Thanks.

Yes, FF gets sluggish from time to time. Sorry but it's the fact! FF also cannot render some websites properly (especially v3.6.10). I'm a big fan of all Mozilla software but FF 3.6.10 makes me very disappointed.

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All of a sudden Firefox (3.6.10) is very sluggish/slow and hangs up

I've been using Firefox (very actively) for over a year now and all of a sudeen (yesterday) it began to act very sluggishly. On sites I have always visited frequently it hangs up for periods of 15-90 seconds or more, won't scroll down, won't open hot links, slowly opens new tabs ...
I rebooted my PC (multiple times), powered down my modem and router, ran a Norton dsik optimization - essentially making sure it was not an outside factor effecting Firefox's performance. (Note: I am using a cable connection.)
I then ran a side by side speed comparison with Internet explorer (on my 2nd monitor) going to the same web sites, and IE had no problems/hang-ups.
FYI I only have a couple of add ins/extensions (Java, Microsoft Framework, Norton, No Squint, & RealPlayer) and none of those are new within the past few weeks at least.
Any ideas on what could be causing this? How to fix? (As I much prefer Firefox to any Microsoft product.)
Thanks.

Yes, FF gets sluggish from time to time. Sorry but it's the fact! FF also cannot render some websites properly (especially v3.6.10). I'm a big fan of all Mozilla software but FF 3.6.10 makes me very disappointed.

All of a sudden Firefox is so slow and hanging

Could someone help me the last few days my firefox has been running so slow and hanging up I uninstalled and reinstalled but still doing it its so slow that I can run like 5 windows in ie with no probs but not even one in firefox I even uninstalled and reinstalled and no luck
== This happened ==
Every time Firefox opened
== a few days ago ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; MDDC)

Hello Amy.
This kind of issues are, unfortunately, more common and the we'd like. Thankfully, 99% of the cases are very easy to solve. However, you do need to diagnose what your exact problem is. Do this:
#run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe-mode] to disable all extensions, themes and plugins. If this fixes your issues, be them with RAM or CPU usage, then you know it's a problem with plugins, themes or extensions. Proceed to number 2. If safe-mode doesn't fix the issues, then read bellow, after this list;
#update all extensions, themes and plugins in your Firefox. If this doesn't solve the issues, proceed to the following number;
#disable all extensions, themes and plugins in your Firefox (not running safe-mode). Being certain that, as in safe-mode, the problems you're having have gone away, enable one plugin at a time. You should be certain that you WANT that plugin to be enabled, so keep your overall number of plugins as low as possible. When you encounter the problems, you know you've found a problematic plugin, so disable it for good. Keep enabling all plugins (except problematic ones) until you've gone through them all.
#enable one extension at a time. Again, be certain that you WANT that extension to be enabled, so keep your overall number of extensions as low as possible. Also, try the theme you want to have installed so see if that is what's causing the problem. When you encounter the problems, you know you've found a problematic extension/theme, so disable it for good. Keep enabling all your extensions (except problematic ones) until you've gone through them all;
#you're done! You've fixed your problems with problematic add-ons. If you want to keep using those problematic add-ons, please contant their author for support.
Ok, if disabling all extensions and plugins through safe-mode didn't work to bring Firefox's CPU and RAM usage to good levels, then you have different issue. The most likely scenario is that you have a third party software running on your computer that is messing with Firefox. Do as follows:
#try reinstalling Firefox. No data will be lost. You can get the latest version for free at [http://www.getfirefox.com/ getfirefox.com]. If that doesn't fix the problem, proceed;
#do a virus/malware check on your computer. If this doesn't fix it, proceed;
#disable all software running in the background that you don't want to have running in the background (in windows, this is done by pressing WINDOWS+R in your keyboard, typing "msconfig" (without the commas) and pressing enter. Now, under the "Startup" tab, you can uncheck the software you don't want, and reboot your system for changes to take effect. If you're unsure of what software you want running, ask someone with more experience). If this doesn't fix your issues with Firefox, proceed;
#check your firewall/antivirus/security suite for enabled functions/features that you don't want and/or may be conflicting with Firefox. You'll find that these features are most likely tied to Internet Security features, such as link scanners or URL checkers and the like. If you're not sure they are conflicting with Firefox, simply try to disable them to see whether or not that's true. As long as you don't browse the web with your antivirus completely off and your firewall completely turned off, there should be no problems. If this doesn't solve the issues, proceed to the following number;
#check your operating system security options, mainly advanced options that are not configured by default. While it's very unlikely that this may be the cause of the problem (after all, it's the last item on the list), it's remotely possible. If this doesn't work, proceed to the following point;
#update your modem/router software. There have been some reports that some modem/router software may cause Firefox and other browsers to loose performance and/or stability. If updating doesn't fix your issue, try other versions of the software, if possible. If you need support with this, contact your modem/router manufacturer. If this doesn't help, proceed;
#clean up your OS registry, using appropriate software. Make sure you've followed my instructions correctly, but if this all doesn't work, [http://support.mozilla.com/en-US/kb/Managing+profiles create a new Firefox profile] (this can be temporary, of course) and see if the issues persist. Report here the results, so we can't help you further.

The browers (FireFox, IE) too slow and hang when load Spanish language many

Hello There,
I am using the STRUTS Framework 1.1 for developing web application.
My objects:
Buyer{
String scompanyName;
String scompanyAddress;
Supplier{
String ssupplierName;
String ssupplierAddress;
I created 2 ArrayList Buyer and Supplier and put them to the ComBox. One Buyer has many Supplier when you select any Buyer....
If you select Supplier then the sub info of this Supplier will be displayed in below. As this action, I have selected many many Supplier for see sub info (Address, Employee...) many time.
When the action submit to Server then I see the Buyer info also change when display because Company Name and Company Address are the Spanish language.
Origin info:
Name : ABC Espa�a S.A.
Address: Carretera de LHospitalet, n� 11, Nave 1, 08940 Cornell� de Llobregat (Barcelona)
First time:+
Buyer:
Name : ABC Espa��a S.A.
Address: Carretera de LHospitalet, n�� 11, Nave 1, 08940 Cornell�� de Llobregat (Barcelona)
Second Time:
Name : ABC Espa���a S.A.S.A.
Address: Carretera de LHospitalet, n��� 11, Nave 1, 08940 Cornell��� de Llobregat (Barcelona)
We have 2 string very long in results when I select many many time and browser too slow and hang if the are to long. That problem only happen with the Spanish language, in other languages are not, It works good.
Please help me to solve these above problems, I have tried to add code in JSP page
<meta http-equiv="Content-Type" content="text/html; charset =ISO-8859-1"> or <meta http-equiv="Content-Type" content="text/html; charset =UTF-8">
But it also hang the browser.
Thanks a lot,
Vu Nguyen

Well... Are you sure that the problem is within the browser? If both browser hang, then check if your OS supports the language the right way. Also, your browsers my have plugins/addons for supporting other languages. Try to look for them or/and post your systems-names here to help others helping you =).
X--spYro--X

Since upgradation of my i phone 4 to ios7, it has become very slow and hangs frequently.. why!!!!!

since upgradation of my i phone 4 to ios7, it has become very slow and hangs frequently. before upgrade, we were not aware that ios7 is not appropriate for iphone 4. more than 50% memory available ,still slow. getting slower. why?

See this discussion...
https://discussions.apple.com/message/23731048#23731048

Laptop run too slow and hang

I bought toshiba setelite amd quad core 4 gb ram 640gb hdd model is l745d laptop 1 months ago , and this laptop running too slow , and hang many times and heatin too much and when I play song there songs play stop play stop mean cauz of hang so plz tell me what is the reason is there a hdd problem motherborad problem or ram problem plz tell me

Hi I recommend you go back to factory setting. That will eliminate software problems.
Dokie!!
I Love my Satellite L775D-S7222 Laptop. Some days you're the windshield, Some days you're the bug. The Computer world is crazy. If you have answers to computer problems, pass them forward.

My macbook pro w/lion running slow and hanging a lot: sometimes freezing

my mid-2010 w/lion is running quite slow and hanging: sometimes freezing. have reset smc and emptied caches. helped for a bit but now even slower. happens with minimal load on cpu and have plenty of memory available.. any suggestions? tq

Increase Disk Space.
http://support.apple.com/kb/PH3915
Repair Disk.
https://discussions.apple.com/thread/3548399?start=0&tstart=0
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My iPad 1 has become very sluggish, why and how to fix?

My iPad 1 has become very sluggish. Even typing often has small delays in showing letters. It seems variable, alas, so no obvious app or condition is implicated. I have closed all apps and done a cold restart but that does not help. I have the latest OS updates. Would pruning my photo library help - I usually add photos directly from my cameras and have quite a few, and they are large files.
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Tom

Actually I was hoping you could tell me how you resolved the leopard Mail problem:
https://discussions.apple.com/thread/2673343?start=0&tstart=0

IPhoto 11 very slow and hangs up the computer continuously

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This performance issue, slow and locking, seems to affect Mac Pro users more than other desktop or laptop users. Wondering if it could be a graphic card issue (my thinking) since Mac Pros had a graphic card problem earlier. Try rebuilding the library with just Options #1 and #6. If that doesn't help try again with #1 and #2.
Is your library on your boot drive? How much free space on your boot drive (with a Mac Pro I've thinking this is not a problem but have to ask)?
Do you have a backup of your iPHoto 09 library? If so keep it safe.
OT

V10 is slow and hangs, how do I downgrade to v9 to get a working browser again?

I have just had the automatic upgrade install v10 of Firefox. It is now very slow, often hangs for long periods at 100% CPU, cannot be interrupted. I cannot click on buttons or links for 10s of seconds after a page load. It is now basically a non-interactive application.

Opt in for sending data to firefox, the data is anonymous and helps developers looking at such problems. If you also use the about:telemetry option from the add-on [https://addons.mozilla.org/en-US/firefox/addon/abouttelemetry/] then you see a graphical representation of that data it may be of use if some knowledgeable person is to assist with the troubleshooting.
I do not have the specialised knowledge, although I may be interested in the results, but will probably not be online much now until next week.
You may also need to consider memory usage & amount of RAM and page file use.
One of the problems Firefox 10.0.1 is addressing is hangs, possibly hangs related to java use, so that upgrade may help.
The data sending option may not be fully and openly documented at the moment but use, I think:
* Firefox Button -> Options -> | Advanced | -> | General | system defaults
* see [[options window - advanced panel]]
If you make a habit of deleting and therefore rebuilding the places.sqlite database at least take the precaution of manually backing up your bookmarks before doing that
* see [[backing up and restoring bookmarks]]
* you may also be interested in [[what is firefox sync]], but take care with that, there may have been some recent teething troubles with a change,and it is intended to copy & synchronise NOT be a foolproof backup system

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Ever since I upgraded to Lion, the new iTunes is extremely slow, and constantly "hangs" (showing the dreader Beach Ball of Death). This happens for an especially long time whenever I'm downloading podcasts and otherwise syncing my iPod Classic.

The problem about screen size values happens to all video that I import in Itunes from the same source (my Samsung HMX-H100P HD Camcorder).
The strange thing is that if you look at the scren size values with other software (QuickTime, Avidemus), the values shown for scren size are corrected as expected: 1280x720.
I installed Itunes 10.4.0.80 1 month ago and it was the first installation of Itunes on my PC.
Reinstalling (deinstall + install) Itunes is not a solution to the problem: I tried this yesterday without success.

Firefox 3.6.7 and 3.6.8 are sluggish, slow and unresponsive.

I am experiencing slow web page loads on all web pages using 3.6.7 and 3.6.8 on Mac, Windows and Linux Ubuntu and CentOS. Numerous websites recommend turning on network pipelining, upping the max requests, and disabling IPv6 dns, using the about:config command. That solved my problem, but beyond voiding my warranty ;^(, it also makes some ipv6 web content inaccessible. On a fresh Firefox install I am encountering wait times of thirty to one hundred seconds per page load, totally unacceptable in my workplace. At home, page loads are between fifteen and thirty seconds, and I am running dual core processors. The support community seems convinced that this is an IPv6 issue, so maybe there is a bug in that area. I don't want to think that IPv6 is going to slow the internet to a crawl.
Anyway the recommended solution that worked cross-platform is to disable IPv6 using about:config, set "network.dns.disableIPv6" to "true."

I've been having the same issue for many weeks. Intermittent freezes where the mouse cursor locks for up to 10 seconds at a time. Random 5-10 second pauses between opening adjacent tabs and just plain intermittent sluggish response. The frequency of slothfulness "appears" to be increasing with time. Either that or my patience is decreasing. I'm using the same box (Intel P4 2.8GHZ/3GB ram) I've had since installing version 6.xx of Ubuntu. Firefox was always been speedy until Ubuntu 10.04. No problems with Opera or Epiphany. Obviously they have nowhere near the feature set of FF so using them is a downgrade in convenience. However the FF performance has degraded sufficiently to where I'm finding myself using Opera more often than not. I've tried all the conventional fixes including the reportedly 'tried and true' '''disable IPv6 using about:config, set network.dns.disableIPv6" to "true."'' method to no avail.
Let's hope a rev is soon released addressing the problem or one of the other browsers begins to offer the same nifty add-ons as FF (fat chance).

Firefox 3.6.12 is running extremely slow and taking 100% CPU on my mac.

Just updated Firefox to 3.6.12 and it's taking over 100% CPU on one of my processors and is running EXTREMELY slow, too slow to use.

Firefox used to be the doggs bollocks now its just a dog.
Back to internet exploder fro me im afraid.I cant keep waiting twenty seconds for everything its like being back in 1993.

5800 XM - very slow and hangs

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I tried to check for my firmware (?) version by dialing *#0000#, but I get an error message, so I don't know my version.
Can anyone help?

It's not about having much on your card or not.
I've seen it happen a few times with the 5800 and other models where a slightly corrupt memory card will cause the phone to run very slowly. The solution to that is to format or replace the card.
If you are certain that the card isn't the cause try these codes. If the first one doesn't help it try the second. You enter them like dialing a phone number. Be sure to back up anything you want to keep as the second code will fully reset the phone and remove all of your data from the phones memory.
Reset to factory defaults (*#7780#) : Restores settings but preserves user data (photos, 3rd party apps etc)
Reset (*#7370#) : This reformats completely the C: drive. All applications and files stored on this drive will be lost and clean default files will be rewritten.
Message Edited by psychomania on 06-May-2009 02:43 PM

Firefox is slow and hangs watching Youtube videos. Safari is OK. What's the word, Developers?

Since late Oct 2011, my Firefox had been hanging while watching videos on Youtube. Any mouse action while a video is playing causes Firefox to hang (spinning wheel).
It turns out that I had caught the beta release of the new Gray Youtube interface - where the backgrounds of all youtube pages are gray.
I got myself back to the old interface by deleting all Youtube cookies.
I no longer have hangs. Page transitions are also much quicker, as was before.
Is there anyone else who has experienced the "new" interface, and problems?
If you do have the new youtube interface, but no problems, then I have more digging to do.
Update Dec 2, 2011:
I have the problem again now that Youtube has released their "new look" interface to everyone.
The problem is generally slow Firefox responses to mouse actions while watching Youtube videos. Firefox will hang completely 2-4 minutes into any Youtube video. (The video does continue to play a-ok.) FF becomes responsive again when the video ends playing.
Problem doesn't occur when I watch a youtube video right after starting FF after having "quit" it. Problem begins occur after FF has been running for a while (visiting other websites?) Is this a symptom of FF collecting some kind of crud in memory or disk?
My old Safari (3.2.1) doesn't have any problems.
As far as I can see, both Firefox and Safari on my system use the same Adobe Flash Player.
So, this isn't a problem with Youtube, Flash Player, or my system, but a problem with Firefox (3.6.24) !?
Anybody (FF developers) have any ideas? I want to keep using FF!

Thanks Cor-el.
The problem existed in safe mode as well.
Changing Flash Player hardware acceleration had no effect.
The problem is gone now, after getting the standard youtube interface back.
What I'd like to know is whether any others who are unwitting testers of the new Youtube interface are experiencing problems, and, if not, what is their system? Which versions of Firefox and Flash Player are they using?

Firefox (3.6.10) is very sluggish/slow and hangs up

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