Java script application appearing everytime i open a new tab

Hi,
Everytime I open a new tab on my computer, a message pops up with Java script application in a box with a yellow triangle with an exclamation mark symbol. I have to click ok twice before I can continue using the internet.
Can you please tell me how to fix this, I think this happened after I upgraded my mozilla website.

hello annap2677, you have quite a few malicious addons present. please try these steps:
# [[Reset Firefox – easily fix most problems|reset firefox]] (this will keep your bookmarks and passwords)
# afterwards go to ''firefox > addons > extensions'' and in case there are still extensions listed there, disable them.
# finally run a full scan of your system with different security tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] and [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] to make sure that adware isn't present in other places of your system as well.
[[Troubleshoot Firefox issues caused by malware]]

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Hello,
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. 
'''Note''': ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

Everytime I open a new tab, it is a blank search page (Bing)..how do i change it ?

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You can check for issues with the new tab page setting.
See this article about the New Tab page (about:newtab):
*https://support.mozilla.org/kb/new-tab-page-show-hide-and-customize-top-sites
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Why does Yahoo Search appear when I open a new tab, when Google is my default homepage?

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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
If it does work in Safe-mode then disable all 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")
In Firefox 4 you can use one of these to start in [[Safe mode]]:
* Help > Restart with Add-ons Disabled
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See also:
*http://kb.mozillazine.org/Corrupt_localstore.rdf
Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
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*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Everytime I open a new tab, I get an alert message saying the URL is not valid and can't be loaded.

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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")
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See:
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*[[/questions/746530]]

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Hi,
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Thanks for your help.
Pat

See:
*http://www.babylon.com/support/faq/usage.html#22
*[[/questions/746530]] How do I fully remove Babylon

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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]]
If it does work in Safe-mode then disable all 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")

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Idiotic system requires me to become a member? only thread does not post a solution to stop annoying background music when opening a new tab.
How do I stop whatever is causing background music to play when I open a new tab in Firefox 32.0.3?
I do not have any add ons....

Update Flash and Silverlight:
Version 5.4.2.18903
Shockwave Flash 13.0 r0
5.1.30514.0
Also may want to reset Firefox just in case there is an issue with changed preferences.
If that is not the case I also recommend a malware scan.
Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/viruses/disinfection/5350 Anti-Rootkit Utility - TDSSKiller]
* [http://general-changelog-team.fr/en/downloads/viewdownload/20-outils-de-xplode/2-adwcleaner AdwCleaner] (for more info, see this [http://www.bleepingcomputer.com/download/adwcleaner/ alternate AdwCleaner download page])
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
Did this fix your problems? Please report back to us!

Firefox just updated, now everytime i open a new tab, it opens yahoo search. I want it to open my topsites when i open a new tab. (sorry for my poor english)

Just like the question...

Type '''''about:config''''' in a new window address bar. Click ''''''I will be careful''''''. You will see all kinds of information that Firefox uses so it knows how to work. There is a search bar at the top of the page. Type ''''''browser.startup.homepage'''''' and check its entry. You can change it to what ever web page you want, or you can enter; ''''''about:blank'''''' for a blank page. I use the Firefox home page; '''''about:home'''''. After, go back to the search bar and type; '''''browser.newtab.url'''''. This is what a new tab page will display. Do the same thing here. You can have the same for both or have each open to different pages.

Everytime I open a new tab on firefox. I get this search engine page powered by Bing. I DON'T WANT IT.

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There was another post that apparently 'solved' the problem but IT DOESN'T WORK. I've tried going to about: config so don't tell me that. What can I do to fix firefox's problem.

WELL. My wonderful girlfriend showed me how to fix it since I couldn't find a solution throughout Firefox's troubleshooting. BASICALLY. I restarted firefox. And voila it's fixed.

Java script application appearing everytime i open a new tab

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