Firefox is very slow, regularly gives me a "Warning: Unresponsive script" prompt that says "A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete."

I do not have Webroot Spy Sweeper on my computer (which can cause this problem as troubleshooting info says). I use Dr.Web antivirus. OS -Windows XP.

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your 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]] and [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Similar Messages

A script on this page may have stopped responding errorcript: chrome://browser/content/sanitize.js:133

Get this error when attempting to clear cache and cookies - why?

This can be caused by clearing the cookies via [[Clear Recent History]]. 
You can try to exclude the cookies to see if that helps.
You can let all cookies expire when you close Firefox to remove unwanted cookies and keep the ones with an allow exception.
* Tools > Options > Privacy > Cookies: "Keep until": "I close Firefox"
If you use [[Clear Recent History]] to clear the cookies when you close Firefox then Firefox also tries to clear the cookies from plugins like Flash and starts a plugin-container process with the Flash player and possibly other plugins as well for each cookie, so that can add extra time if there are a lot of cookies to remove.

Firefox browser very slow signing in and moving from one website to another

firefox browser very slow signing in and opening different websites.
== Operating system ==
Windows xp

Hello BJ.
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 reinstally 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;
#clean up your OS registry, using appropriate software. If this doesn't do it, I'm out of ideas. Except make sure you've followed my instructions correctly.

Several times every day I get the following message or something very similar, what can I do? A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Scrip

A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
Script: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsBlocklistService.js:648
== This happened ==
Every time Firefox opened
== It just started about 2 weeks ago but is now happening every day

The most likely cause is a problem with Java on your system - older and/or messed up Java installations seems to cause this issue sometimes.
To fix:
Step 1: Try installing latest Java version. Check your Firefox/system browser plugins from this page, and install latest version: [http://www.mozilla.com/en-US/plugincheck/ Mozilla Plugin Check Page] (also works for most other browsers)
If latest Java (currently "Java(TM) Platform SE 6 U20 - Next Generation Java Plug-in 1.6.0_20 for Mozilla browsers") does not fix the problem, you may have more versions installed on your system causing problems for each other. This leads us to -
Step 2: Uninstall those you can from Control Panel -> Add/Remove programs. To make sure it is properly cleaned out, see [https://support.mozilla.com/en-US/forum/1/595817#threadId608043 these excellent tips from noah_sumo] to clean out Java completely, then install latest version again from the [http://www.java.com/en/download/manual.jsp Java.com download page].
If you ''still'' get this error, you may have Norton or another security program which can also in some cases cause this issue. That takes us to:
Step 3: Configure security program correctly.
For Norton 360 see [[Configuring Norton 360]].
For Norton Internet Security, see [[Configuring Norton Internet Security]].
For other firewall programs, see [[Firewalls]].
If none of these steps solves the problem, please provide any detail you can think of that may be related and let us know, and we will try to find other solutions to get this solved.

Bookmark restore problem: " A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. script: resource://gre/modules/PlacesUtils.jsm:1436"

I'm trying to restore bookmarks from a .json file (as xmarks keeps duplicating and corrupting my list) and Firefox often works really slowly also. I know this as I ususally get a script message errors and option to continue or stop.. In this case with restoring bookmarks everytime I try to restore with my saved .json file I get an interruption, and the message " A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. script: resource://gre/modules/PlacesUtils.jsm:1436" i stop the script (if i continue the same warning comes up) and then get half of my bookmarks restored or similar only if that, and another message telling me FF is unable to process the bookmarks!? I think this unresponsive script is the one that randomly comes up when I'm working FF hard, and causes it to run slowly- or it is a very similar looking message. Any comments and ideas appreciated .
Running on Macbook pro 2GHz Intel Core 2Duo, 2Gb 667 Mhz DDR2 OS 10.6.8

One other thing....the same script error on Ubuntu Linux 11.10 on my old Dell. And it seems that the backup I thought I had made probably was saved incorrectly, again only half of the bookmarks I had sorted out were created in the file- i should have exported a copy as another safeguard!

I have an error message that says A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see

The exact and full message is:
A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
Script: https://fbstatic-a.akamaihd.net/rsrc.php/v2/yk/r/w50KHoJTfoZ.js:26
so, I have read the many other threads on this problem:
1. I just installed firefox for the first time - this happens on facebook and many other sites
2. I have reset firefox - did not fix the problem
3. I have checked all my extensions and plug ins for up to date
4. I turned off hardware acceleration
5. I tried disabling all my plug ins
6. I used to use firefox, but it started doing this and I was never able to resolve this and went to chrome.
I am using Win 7. No problem, ofr the most part, using IE or Chrome, I just wanted to try firefox again. Does it not work with win 7?

You can try to clear the Flash local storage and settings if the problem is with the Flash plugin.
*Windows Control Panel > Flash Player > Storage: Local Storage Settings
**Remove a specific domain: Local Storage Settings by site
**Remove all domains: Delete All and Delete Data
Flash Website Storage Settings panel:
*http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
Global Storage Settings Panel:
*http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager03.html

Why do I constantly get this message: Unresponsive Script, A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

I get this pop up screen continuously on my screen. Ever since I switched to Firefox, I was using Safari. The only other Apps open are my Mac Mail and Finder.
A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Script: http://static.ak.fbcdn.net/rsrc.php/v1/yY/r/BaybJiEemV4.js:13
Each time I am asked to either Stop Script or Continue.

Looks like a script on the Facebook page.
Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

How do I stop this A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Script: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsExtensionMana

What is causing this warning when I open firefox and how do I correct it? > A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
Script: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsExtensionManager.js:623 <
== This happened ==
A few times a week

I do not have the Ask toolbar and I get the Unresponsive Script message everyday.

Where would I start searching for someone to contact regarding this CONSTANT message? "A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. "

This is a cut and paste of the repetitive message that shows during every web session I have, repeatedly .
"A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
Script: file:///C:/Program%20Files%20(x86)/Mozilla%20Firefox/extensions/%7B635abd67-4fe9-1b23-4f01-e679fa7484c1%7D/components/nsYahooFileIO.js:26".
I am going to go nuts if I don't fix this soon, please help!

The most likely cause is a problem with Java on your system - older and/or messed up Java installations seems to cause this issue sometimes.
To fix:
Step 1: Try installing latest Java version. Check your Firefox/system browser plugins from this page, and install latest version: [http://www.mozilla.com/en-US/plugincheck/ Mozilla Plugin Check Page] (also works for most other browsers)
If latest Java (currently "Java(TM) Platform SE 6 U20 - Next Generation Java Plug-in 1.6.0_20 for Mozilla browsers") does not fix the problem, you may have more versions installed on your system causing problems for each other. This leads us to -
Step 2: Uninstall those you can from Control Panel -> Add/Remove programs. To make sure it is properly cleaned out, see [https://support.mozilla.com/en-US/forum/1/595817#threadId608043 these excellent tips from noah_sumo] to clean out Java completely, then install latest version again from the [http://www.java.com/en/download/manual.jsp Java.com download page].
If you ''still'' get this error, you may have Norton or another security program which can also in some cases cause this issue. That takes us to:
Step 3: Configure security program correctly.
For Norton 360 see [[Configuring Norton 360]].
For Norton Internet Security, see [[Configuring Norton Internet Security]].
For other firewall programs, see [[Firewalls]].
If none of these steps solves the problem, please provide any detail you can think of that may be related and let us know, and we will try to find other solutions to get this solved.

Everytime i start firefox, I get a window that says:A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

Each time i open Firefox, i get a window opening saying:A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
Script: file:///C:/Program%20Files/Mozilla%20Firefox/components/nsBrowserContentHandler.js:619
When i try again, i get the same result, if I continue, nothing happens for a few minutes then fire fox opens with awindow saying to start again.
== This happened ==
Every time Firefox opened
== I installed Firefox ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.30729; .NET CLR 3.5.30729)

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
You can use "Disable all add-ons" on the ''Safe mode'' start window.
You have to close and restart Firefox after each change via "File > Exit" (on Mac: "Firefox > Quit")

A script on this page may be busy or it may have stopped responding. You can stop the script now, or you can continue to see if the script is complete. Script file:C:\program files\mozilla firefox\components\nsBockListService.js:648

A script on this page may be busy or it may have stopped responding. You can stop the script now, or you can continue to see if the script is complete. Script file:C:\program files\mozilla firefox\components\nsBockListService.js:648

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]]
* [[Troubleshooting plugins]]

I keep getting script errors when accessing Amazon Seller merchant pages. I get the following A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Script

I keep getting script errors when accessing Amazon Seller merchant pages. I get the following A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Script: chrome://spautofill/content/spOverlay.js:150, I also get js210 as well. I have cleared all cookies and history and unistalled Firefaox and reinstalled. Been thru my AVS and set the site as trusted in every possible place. Still get the problem. Do not get it with IE on same PC.
== URL of affected sites ==
https://sellercentral.amazon.co.uk

Same problem but with a different vendor site:
https://www.webvitamins.com/myfavorites.aspx
Not only does the page hang, but the other tabs also hang.
I contacted the vendor and their reply was "we were told that this looks like a script that is used by "Sticky Password", third-party software that must have been installed on your browser. However, our website did not install it and does not have anything to do with it." As far as I can tell, "Sticky Password" is not installed on my Firefox.
Same problem as above occurs, but with IE 8.0.6001.18702. Therefore, it is not unique to Firefox.
CAUSE DETERMINED: Have determined that this problem only occurs when Kaspersky Password Manager is installed. In Firefox, if the "Password Manager Autofill Engine" add-on is disabled, the problem goes away.

I get this error message before Firefox crashes A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can co

Can you help? Thank you for all you do.
Kimberly
I get this message and then firefox crashes all while I am in google calendar accessing the tasks menu in google calendar through my gmail account
A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
Script: resource://firefox-at-gingersoftware-dot-com/api-utils/lib/loader.js -> resource://firefox-at-gingersoftware-dot-com/api-utils/lib/sandbox.js -> resource://firefox-at-gingersoftware-dot-com/api-utils/lib/content/content-proxy.js:776

If you have submitted crash reports then please post the IDs of one or more crash reports that have this format:
*bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
You can find the IDs of the submitted crash reports on the about:crashes page.
*You can open the about:crashes page via the location bar, like you open a website.
See:
*http://kb.mozillazine.org/Mozilla_Crash_Reporter
*https://support.mozilla.org/kb/Mozilla+Crash+Reporter
If you can't open Firefox then see:
*http://kb.mozillazine.org/Mozilla_Crash_Reporter#Location_of_crash_reports
*http://kb.mozillazine.org/Mozilla_Crash_Reporter#Viewing_crash_reports
*https://developer.mozilla.org/en/How_to_get_a_stacktrace_for_a_bug_report
See also:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.org/kb/Firefox+crashes
Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do not click the Reset button on the Safe mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
Try to set the network.http.spdy prefs to false on the about:config page.
*network.http.spdy.enabled
*network.http.spdy.enabled.v2
*network.http.spdy.enabled.v3
*http://kb.mozillazine.org/about:config

Get error when installing .json back up file A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script

get error when installing .json back up file A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script
Also tried to chang places.sql or what ever to my back up .json file and that wouldnt work. Is there a way to just move my backup .json file some where my bookmarks are a bigger file and i t will take a bit to upload.

A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue.
Script: chrome://browser/content/places/editBookmarkOverlay.js:909

Firefox was fast when I first started using. Now, very slow to open and freezes often. Frequent message is "Warning-unresponsive script". Do I need to switch back to Internet Explorer?

Switched from Internet Explorer because seemed slow. Firefox was fast at first. Then upgraded to Firefox 4 and frequently have trouble opening. Sometimes page doesn't open, or is very slow. If I try to open again I will get Mozilla Firefox Unresponsive or a message that say "Warning-Unresponsive Script". Often have to restart and do the whole thing again. Don't really want to switch back to Internet Explorer, but getting tired of taking a half hour to get into my emails!

I am having the same problem, but not sure what's causing the slow down. Restarting in safe mode fixes the performance problem... but disabling all plug ins and extensions in normal mode (and restarting firefox) still shows the bug. Any ideas?

Firefox is very slow, regularly gives me a "Warning: Unresponsive script" prompt that says "A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete."

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