Firefox Support Forum

continous errors about "shockwave flash", "script has stopped working" etc, causing numerous slowdowns, lock-ups, and crashes. have tried several fixes, but none have worked.....please advise

After updating to Firefox 27 all webpages take a few dozen seconds to several minutes to load. When loading a webpage Firefox's status displays "connecting" and the CPU gets maxed out with 95 to 100% of its cycles taking by Firefox.

The computer is older so it is a little slow but Internet Explorer 8 has no trouble opening the webpages and neither do other computers on the LAN so it is not a network issue. I have tried restarting Firefox, disabling add-ons, deleting add-ons, disabling hardware acceleration, restarting the computer, and reinstalling Firefox after wiping every trace of it and its user data from the hard drive and registry.

CPU: AMD Athlon 2800+ 2.08GHz RAM: 1GB OS: Windows XP Home Edition Service Pack 3 32bit

Comments by a forum moderator.
(Modified April 30, 2014 12:11:58 PM BST by John99 ) ~J99
Rather a long thread so I will add some comments here where easily seen.

• For general problems please see my post /questions/985969?page=3#answer-546520
  Updated 30th April 2014 to mention the outstanding known issue (aka the bug with only three votes)
• Just below that jigebren has kindly summarised some workarounds at that particular time and the issues found from this thread /questions/985969?page=3#answer-546599

 Modified June 18, 2014 6:08:41 AM PDT by John99

• Workaround,
  A chrome hack to disable the throbber may resolve the issue as a workaround allowing pages to load quickly. See my post /questions/985969?page=4#answer-595327

I just checked task manager, since my computer was running a bit slow, and found firefox to be using nearly 1.2 GIGABYTES of RAM, with only 4 tabs open + Chatzilla for IRC. I have Skyrim running at the same time, and it is using LESS RAM than Firefox is!

I've tried disabling plugins, to the point where I only have the Flash and Adobe PDF ones running, I had to disable the plugin container since it crashes repeatedly (Usually at least once every couple of days). I tried using the "Free Memory" options in about:memory, and they do literally nothing to reduce the RAM usage. It's normally between 400 and 600 MB (Which is still insanely excessive for a browser). Closing Chatzilla only reduces the RAM usage by about 10-15 MB, so it doesn't seem to be the problem.

How in the name of all that's sacred is a browser using more RAM than a modded version of Skyrim?

Comment by a forum moderator.
This is a popular thread with over 10000 views. By all means scroll through and read it for useful tips & information. If however you have your own problem See

1. My comment about telemetry in post-524332and consider turning that on.
2. My post 510510 & use special link and start your own thread.
3. (2nd edit 21Jan2014) Also note some related questions with solutions found after they started a new thread
   /questions/982539 the addon no script was apparently causing 1GB of memory use.
   /questions/980440 a workaround was to tweak the pref Browser.sessionhistory.max_total_viewers to improve the memory issue

I have the latest version of Firefox (26.0). I'm not sure if a Flash or Java update caused this issue.

Vine videos were playing fine in my browser. This was AFTER I changed the about:config settings for media.windows-media-foundation.enabled to "false" - They never seemed to load when this was set to "true"

But now, the problem is back. Vine videos will not play. I recently updated to Firefox 26.0 and this issue came back. Additionally, I did install a Java update. I have tried EVERYTHING to restore my browser to the way it was but nothing works. I have reinstalled Firefox. I have done clean installs of both Flash and Java. I have tried starting Firefox in safe mode, but the problem remains.

If I go to a Vine page (https://vine.co/v/heXdnb0m3dm) for example, all I see is a static image. I can't click on anything. It's just a static frozen image. On Twitter, the same Vine video appears as a black screen where it previously used to load just fine. Even on Tweetdeck, which uses Firefox as the default browser, the videos will no longer load. This is all when media.windows-media-foundation.enabled is set to "false"

If I change the settings so media.windows-media-foundation.enabled is set back to "true" then the video plays but I have no control over sound. There is, in fact, no sound. The video plays on a loop. No sound. In fact, I can not even control the sound icon. Clicking the icon does nothing. It doesn't change to signify that the sound is on or muted. It remains the same muted icon.

So, basically if I try to play Vines by forcing them into flash, I get nothing at all. I get a static image. No video. No sound. No function.

If I leave the defaults the same and play them via HTML5, the video plays, but there is no sound and no control.

Please help! I have tried everything at this point!

UPDATE: I temporarily set security.csp.enable to "false" and the pages load up perfectly. Is this safe, though?

Recently got updated Firefox v.26.0 and I have noticed the yahoo mail when opened could not be displayed properly. Text is scattered on screen and it also show "Your screen elements are hidden from view. Press Esc or move pointer to the center of the screen to return to Mail." Even if i press Esc or move pointer nothing happen.

I wonder why this is happening? I also want to test the problem in MS Internet Explorer but I do not know how could I disable Firefox temporarily.

Any advice will be much appreciated.

Thank you

I've cleared cookies multiple times

I've emptied the cache

I cleared my download history, and a majority of my browsing history

I've tried having hardware acceleration for both flash and firefox on and off

I turned off all my apps and plugins and when that did nothing I turned back on the ones I need. I never had a lot of apps to begin with. only a max of 5. I had quite a few plugins, but i disabled all but quicktime, flash, and silverlight. I have those three set on "ask to activate" so none are "always active" anymore.

I also tried a couple things from the FAQ and forums here about changing a few settings in the "about:config" setup.

A few of the above things initially worked, but after a day or two it'd be back to sucking up my CPU and memory. I would then try the same thing again, and this second time there would be no improvement. The real memory will fluctuate between 200 MB and 1.7 GB, and has done so for quite a while.

Even after I've left streaming sites, and sites with lots of images, and I'm not downloading anything, the memory and the CPU will still do that. I only have a handful of tabs open at a timeusually, and all of them are mostly text. I'll quit and reopen firefox, which will initially bring the memory and CPU usage down, but it inevitably climbs up quite quickly, regardless of my tab usage. It'll be the same if I'm playing a flash game or scrolling through blogs.

I never had any of these problems with Firefox 23, and my internet usage habits haven't changed at all. I had some of this slowness a few times with version 24, but nowhere near as bad as this, or as constant. Almost everyday I end up googling for other ways to speed things up. Everything I do never slowed down Firefox on earlier versions.

I've tried all my usual tasks on Safari which will never climb above 30-40 MB of memory, even on netflix streaming, or flash games, and the CPU will average around 8 and 11%.

A few days ago I set up my laptop from scratch after a long time of not using it. In the process, I set up Firefox Sync to link it to my desktop's browser. This is the only thing I have changed recently. However, after rebooting my laptop, I noticed that whenever I closed the browser and reopened it, it would not restore my previous tabs. Of course the options are set to restore my tabs from last time. Even the manual options to restore my previous session from the history menu are greyed out. And perhaps more bizarre of all, when I click the 'x' button to close the browser, I have to click it twice to close it - clicking it once does nothing. Firefox is the only application experiencing this odd issue.

I thought it was just my laptop and decided it was too much of a headache to worry about for now, since I rarely use that. I've been going about my business as usual on my desktop for the past few days with no issue...until I booted up my computer this morning and found the same situation. None of my tabs (and I had numerous tabs across multiple tab groups that I've been using with no problems for months!!), when I close and reopen the browser it still doesn't remember what was open when I closed it, and once again I have to click the close button twice for it to take. The 'restore session' options in the history menu are once again greyed out.

Everything else appears fine - all my add-ons are still there, and it's still recording my history when I open new pages and close the browser. It's just not restoring the tabs. This is extremely frustrating to me as someone who ALWAYS has several tabs open at any given time. At least on my desktop, Firefox says it's up to date, so that shouldn't be an issue (I thought maybe a browser update could fix it). Is there anything I can do to fix this, preferably recovering my previous sessions in the process? I lost quite a bit and I'm not too happy about that...but even if recovery is impossible, can I at least fix it so it retains my session history going forward? Any help would be greatly appreciated.

So recently my Firefox browser has been leaking memory like crazy going up to 1.7 GB in used RAM. It starts off fine when I first open it, but progressively gets worse over time, making scrolling a choppy and painful task. This started with version 28.0 but I've since upgraded to 29.0 and the problem persisted. I've done hours of research on the problem and have tried all the following solutions, to no avail:

- Turning off hardware acceleration/smooth scrolling/auto scrolling - Creating a new profile - Completely uninstalling and reinstalling Firefox - Running it in safe mode (still lagged, even in safe mode!)

Has anyone found any real solution to this problem?

Firefox safe mode does not solve the issue. Disabled and also uninstalled antivirus and firewall and did not help. Disabled all startup items except the ones known not to cause the problem. Other browsers such as Chrome has no problems. Mozilla Thunderbird also will not connect.

I have read and applied all the fixes from previous responses to this problem and nothing works. Scrolling through Facebook is a nightmare with the page re-loading every 10 seconds, and creating a visual disturbance on screen. Please advise a permanent fix. Thanks

As of around 1 week ago, I can no longer access facebook, any mozilla/google related page however I can still access the google search engine by entering the 197.1.1 code thing (not very pc literate).

My problem is whenever I type google.com or facebook.com into the url, nothing actually happens, the url looks like it seeking than it just revert back to whatever url I was on before. I can access youtube but the comments section is just loading but thing actually shows up. If I try to open firefox help page a new window would open but it is just blank even though I can see the see the address in the url. I can however open trouble shooting page and about firefox but none of the others page in the help option.

I have tried reverting firefox to default and restart firefox with no addon without any changes. I have tried ipconfig /flushdns and also resetting my host file from mrfixit as well as scanning for malware from malbytes, adaware and spybot and none of them made a difference at all.

I am currently using firefox 26, OS Windows 7 64bit.

Hi,

Domino Release 8.5.3FP3 (Linux for Intel) $HaikuForm - 481.21 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0

A problem has occurred which may have caused the current operation to fail. TypeError: EcK.getAnonymousElementByAttribute is not a function 12/21/2013 01:04:49AM https://<webmailaddress.ro 10="" <="" ?opendocument&form="l_StdPageOperations_Gecko&amp;l=en&amp;gz&amp;CR&amp;MX&amp;TS=20121107T181409,88Z&amp;charset=ISO-8859-1&amp;PresetFields=s_homeView;1,s_DragCover;1,s_Base;1,s_Std;1,s_FullInit;1:" forms85.nsf="" inotes="" p="" proxy=""></webmailaddress.ro>

Pls, advise. Thank you very much.

For those who are not happy with Firefox's removal of the downloads display progress bar in the 25 series, you'll be even more unhappy with the 26 series. Even typing about:config and isetting browser.download.useToolkitUI to true no longer works. I sincerely despise companies that DO NOT provide their users OPTIONS, OPTIONS. OPTIONS! Instead of pissing off a sizable number of people who prefer things the way they were. Stop changing things for the worst! I want to monitor my downloads progress without having to take an extra step by clicking on the "Library" tab. Who are you trying to impress?

Whenever I use Facebook dynamic search, Firefox stops responding. This issue also involves writing a new post/comment using the at-sign, which starts dynamic user search.

• Before update from FF27 to FF28 it did not happen. (I use Windows 7.)
• Safe mode does not help.
• Clearing cache and deleting Facebook cookies does not help. Neither new profile nor clean install helps.
• There are no crash reports within Firefox as well as no Windows error logs generated.
• Other browsers on this computer do not have this problem, another computer with FF28 that I use works well. Firefox 28 on this computer with Ubuntu Linux works.

Edit: I got Firefox not responding even at going through conversations (messages). So I can generalize that any operation at Facebook, during which three "waiting" bars appear, can lead to the not-responding state of Firefox.

i always have had four tabs on my as a standard when i open firefox. all of a sudden a tab called Web Search opens. i neither asked for or want this. how can i stop it from opening

I am using Win XP and Mac OS The Pinned Tabs disappear - I don't understand when they do So I have to redo them manually once in a day or two

Is there a simple solution ?

When we got up this morning my mum had a message on her computer telling her to download Mozila FireFox system tools 17.54.5468 - the message popped up when she tried to play a facebook game. We clicked it and downloaded it and the computer seemed fine after that (but we did notice something called uniblue was now on her computer). Then i got onto my computer and when i tried to get into yahoo groups i got the same message. I also got a different message when half way thru watching a video on youtube a screen came up saying that the certificates for youtube were invalid or didn't exist. I deleted firefox completely - including the folder in programs (x86) - reinstalled it and i can once again play youtube videos (so far) but i'm still getting a message for Mozila FireFox system tools 17.54.5468 when i try to get into yahoo groups. My question - is 'Mozila FireFox system tools 17.54.5468' a real message from you guys and if its not, does anyone know how i get rid of it? I have Windows 7 and its a desktop if anyone needs to know.

Firefox Aurora force updated last night and the addon bar is missing. It doesn't come up with Ctrl+/, it's not on the customize page, it's not listed under toolbars.

there is already another question with the same problem I am having, but to be able comment on it I needed to ask my own question to register. I am running windows 8. I was using firefox when the prompt came up "firefox needs to update... and will reopen in a few moments". Firefox never reopened Instead I received an error message "C:\Program Files (x86)\Mozilla Firefox class not registered". I have uninstalled, reinstalled, deleted C:\Program Files (x86)\Mozilla Firefox , reinstalled and still receive the same error message "C:\Program Files (x86)\Mozilla Firefox class not registered". When I reinstall firefox it never opens its always comes up with the error message. Any solutions?

Does not matter whether I have open tabs or not. The browser just closes without warning. No crash reports are generated nor windows that open that say the browser has crashed. When I re-open the browser none of the tabs I was working with open back up.