Additional firefox window opens with "dangerous site"

Twice, in the last week, an additional Firefox window opened in the tray, which, when opened, indicated it was a "dangerous site." I have discovered that, since these events, I have lost at least one log-in (my cookies are not disabled). Microsoft Security Essentials indicates everything is clean. Do you have any idea what may have caused an extra browser window to open & place itself in the tray with a dangerous site inside??

hi dan, this happened with the firefox 33 update, which contains a new technology which will make the browser become more responsive relying on your graphics hardware: http://benoitgirard.wordpress.com/2012/05/15/off-main-thread-compositing-omtc-and-why-it-matters/
however with certain graphic cards & old drivers it unfortunately appears to be buggy and lead to the black screen you've observed.
sorry for the troubles this has caused...

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Firefox is adding advertising links to certain words on my website cornish-surfing.co.uk, and when I open a new tab an additional window opens with unwanted sit

Firefox is adding advertising links to certain words on my website cornish-surfing.co.uk, and when I open a new tab an additional window opens with unwanted sites.
1. How can I stop these things from happening?
2. Why is it happening?
These things only happen when I’m using the Firefox browser. I use Sophos antivirus and firewall and the scans indicate my system is clean. So I’m assuming that it’s built into Firefox or there’s a security flaw with Firefox.
Can you let me know which and how I can stop it from happening?
Graham Jappé

hello, this sounds like a problem possibly caused by adware on your pc (certainly nothing that is shipping with a plain official firefox build).
please go to ''firefox > addons > extensions'' & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there and run a full scan of your system with the security software that you have in place and different other tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] & [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner].
[[Remove a toolbar that has taken over your Firefox search or home page]]
[[Troubleshoot Firefox issues caused by malware]]

When I open Firefox another separate Firefox window opens with an ad. How do I stop this?

Since Firefox upgraded to 3.6.12 I have been having a separate Firefox window open everytime I open up Firefox. This separate window has some kind of advertisement. I click on that separate page to close it out and sometimes it also closes out the original I opened up, sometimes it doesn't. It is getting very frustrating to have these other sites just open up and I have to keep closing them out. I have checked my pop-up blocker and it is turned on...but this really is not a pop-up. So how do I get these advertisements to stop showing up?

Sounds like Malware.
Install, update, and run these programs in this order. They are all free for personal use, but some have limited functionality in the "free mode" - but those are features you really don't need to find and remove the problem that you have. '''(Not all programs detect the same Malware.)'''
Malwarebytes' Anti-Malware - [http://www.malwarebytes.org/mbam.php] 
SuperAntispyware - [http://www.superantispyware.com/] 
AdAware - [http://www.lavasoftusa.com/software/adaware/] 
Spybot Search & Destroy - [http://www.safer-networking.org/en/index.html] 
If these don't find it or can't clear it, post in one of these forums for specialized malware removal help: 
[http://www.spywarewarrior.com/index.php] 
[http://forum.aumha.org/] 
[http://www.spywareinfoforum.com/] 
[http://bleepingcomputer.com]

The firefox window opens with no icons visible, just a black window

Hi,
When I open the firefox browser the window doesn't show me any icons, it's literally a black window.
If I hover over where File or Edit buttons would be I can see a sort of shadow of the options menu that would usually appear, however there are literally no buttons or names visible. I've done the obvious; uninstalled and re-installed, restarted the computer etc.
Please help.
Thanks
Dan

hi dan, this happened with the firefox 33 update, which contains a new technology which will make the browser become more responsive relying on your graphics hardware: http://benoitgirard.wordpress.com/2012/05/15/off-main-thread-compositing-omtc-and-why-it-matters/
however with certain graphic cards & old drivers it unfortunately appears to be buggy and lead to the black screen you've observed.
sorry for the troubles this has caused...

Why do 2 firefox windows open every time a click on an email i outlook 2010?

I am running firefox and outlook 2010. When I click onan email in outlook, two firefox windows open, with address to local temp files on my c drive. How can I get this to stop?

Thanks for getting back to me; i was not able to get to the computer until now.
No, not thru web access; it is via the Outlook provided thru Microsoft Office.

Upon firefox update this morning, every window opens with error: CaptureMovieFox could not be initialized. Some files of the extension may be missing or there is a problem with the Firefox.

upon firefox update this morning, every window opens with this error in a popup: ''CaptureMovieFox could not be initialized. Some files of the extension may be missing or there is a problem with the Firefox.''
when I close the popup, the original window opens seemingly without issue.

http://getfirebug.com/releases/firebug/1.8/
visit this and find the compatible version of this f***ing firebug. which certainly has nothing to do with us (not-programmers). i have been having this problem for months but now the last link worked for my firefox 6. Find yours here.

Every time i open up a window another window opens with 8 tabs & it states Index of file:///C:/Program Files (x86)/Mozilla Firefox/.. They open constantly I searched on google but no help.. What should i do

every time i open up a tab with fire fox other window open with 8 tabs each & y=they all state ::
Index of file:///C:/Program Files (x86)/Mozilla Firefox/
I tried searching on google but no help.. what do i do??

Hello Susanne.
You may be having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not coming from one of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] and select ''Disable all add-ons''. If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme. You can troubleshoot plugins the same way.
If you want support for one of your add-ons, you'll need to contact its author.

When I am using Firefox I keep getting unrequested Windows opening with full page advertisements. Why is this happening and how can I stop it?

When I am using Firefox I keep getting unrequested Windows opening with full page advertisements. Why is this happening and how can I stop it? This is particularly aggravating when the new page has music or a voice message that intrudes even when I am not looking at the page.

Do a malware check with some malware scanning programs on the Windows computer. 
You need to scan with all programs because each program detects different malware. 
Make sure that you update each program to get the latest version of their databases before doing a scan. 
*http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
*http://www.superantispyware.com/ - SuperAntispyware
*http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
*http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
*http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

Can anyone tell me how to get rid of tlb search? it unfortunately entered into my mac. Whenever I use safari, a pop-up window opens with some ads. Please help me to find a way to remove this malware.

Can anyone tell me how to get rid of tlb search? It unfortunately entered into my mac. Whenever I use safari, a pop-up window opens with some ads. Please help me to find a way to remove this malware.

You installed the "DownLite" trojan, perhaps under a different name. Remove it as follows.
Malware is constantly changing to get around the defenses against it. The instructions in this comment are valid as of now, as far as I know. They won't necessarily be valid in the future. Anyone finding this comment a few days or more after it was posted should look for more recent discussions or start a new one.
Back up all data.
Triple-click anywhere in the line below on this page to select it:
/Library/LaunchAgents/com.vsearch.agent.plist
Right-click or control-click the line and select
          Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.* A folder should open with an item named "VSearch" selected. Drag the selected item to the Trash. You may be prompted for your administrator login password.
Repeat with each of these lines:
/Library/LaunchDaemons/com.vsearch.daemon.plist
/Library/LaunchDaemons/com.vsearch.helper.plist
/Library/LaunchDaemons/Jack.plist
Restart the computer and empty the Trash. Then delete the following items in the same way:
/Library/Application Support/VSearch
/Library/PrivilegedHelperTools/Jack
/System/Library/Frameworks/VSearch.framework
~/Library/Internet Plug-Ins/ConduitNPAPIPlugin.plugin
Some of these items may be absent, in which case you'll get a message that the file can't be found. Skip that item and go on to the next one.
From the Safari menu bar, select
          Safari ▹ Preferences... ▹ Extensions
Uninstall any extensions you don't know you need, including any that have the word "Spigot" or "Conduit" in the description. If in doubt, uninstall all extensions. Do the equivalent for the Firefox and Chrome browsers, if you use either of those.
This trojan is distributed on illegal websites that traffic in pirated movies. If you, or anyone else who uses the computer, visit such sites and follow prompts to install software, you can expect much worse to happen in the future.
You may be wondering why you didn't get a warning from Gatekeeper about installing software from an unknown developer, as you should have. The reason is that the DownLite developer has a codesigning certificate issued by Apple, which causes Gatekeeper to give the installer a pass. Apple could revoke the certificate, but as of this writing, has not done so, even though it's aware of the problem. This failure of oversight is inexcusable and has compromised both Gatekeeper and the Developer ID program. You can't rely on Gatekeeper alone to protect you from harmful software.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
          Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

If Firefox is opened with a URL parameter, the parameter persists through attempts to clear history.

When Firefox is opened with a URL, the URL is a parameter in Firefox's command line and could present a potential privacy leak as it is not cleared by Clear Recent History.

In addition, right click on Firefox's launch icon, click "Properties", note the third line; the "COMMAND" entry which most likely reads "Firefox -u". The "-u" is what Anonymous is referring to as a parameter. It (-u) represents an instruction to Firefox to replace your destination URL with another destination that is not intended.
This may point to a virus in an applet, could be a porn site, whatever.
If a pop-up box asks for permission to download a file, DO NOT CLICK OK.
Click "Cancel".
I did a cold boot out of instinct next, then get rid of that "-u". I cannot speak for the clear history but it sounds like a good idea, also. I made sure I had a BACKUP of my bookmarks as a precaution, then did what Anonymous suggested.
Another thought I only have one icon, so cannot vouch for it but you may need to remove the "-u" on each launch Firefox you have.
Also, do not be as blasé as I was, if the URL looks wrong, it probably is wrong. Go browse somewhere else.
Alex

When i first open firefox homepage (opens with google) after 3 seconds page freezes and cannoct be closed. i have to open seconed homepage to shot pc down. this has only happened since i installed firfox 4. what do i do to fix this

when i first open firefox homepage (opens with google as set by firefox) after about 3 seconds the page freezes and cannot be closed or minimised. i have to open second homepage to shut pc down or continue to use pc. this has only happened since i installed firefox 4. what do i do to fix this

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

I like to know when i use fire fox why it take so much resource of my computer ? it almost 1/4 of my 4gig of memeory , ihave 6,7 page of firefox window open

i like to know when i use fire fox why it take so much resource of my computer ? it almost 1/4 of my 4 gig of memory , i have 6,-8 page of firefox window open at cpu level its is almost 25% been used up. i see its taking too much resource i wonder why ?? how not to take so much and it crashes often.. any help,ive 24.0 ,

Firefox add-ons take some memory. This amount varies depending on the add-on.
'''Try Firefox Safe Mode''' to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
''(If you're not using it, switch to the Default theme.)''
* On Windows you can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac you can open Firefox 4.0+ in Safe Mode by holding the '''option''' key while starting Firefox.
* On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
[[Image:FirefoxSafeMode|width=520]]
''Once you get the pop-up, just select "'Start in Safe Mode"''
[[Image:Safe Mode Fx 15 - Win]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
Does this decrease the memory usage? Please report back soon.

When download attachments, a window opens with a proposal to save the file HdFileDownloadServlet ?????

When download attachments, a window opens with a proposal to save the file HdFileDownloadServlet ?????

Does this also happen on this forum page?
If not then please post a link to a web page where this happens.
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

New windows open with different toolbars (and missing URL bar)

When I select the "New Window" button or "Open in New Window" from the context menu, a new Firefox window opens - however, the toolbars are completely different from the original open window. Specifically, the URL location bar is missing.
I can add it back, but the change then modifies my original toolbar setup.
More bad behavior: Even if I modify the new window back to the way I wanted it, new windows opened from that window revert back to the modified version, with no location toolbar.

You can try:
* http://kb.mozillazine.org/Prevent_websites_from_disabling_new_window_features
* http://kb.mozillazine.org/JavaScript#Advanced_JavaScript_settings
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
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

When I click on Firefox for the first time after I boot my PC it takes three minutes to but after that new Firefox windows open promptly.

Hello and thank you for being available to receive this enquiry.
I like Mozilla.
I like Firefox.
In recent months I have experienced and accumulation of problems. Today (September 25th, 2011) I have set about trying to deal with them.
After consulting your Troubleshooting Section I have made a range of changes that I hope shall resolve problems like freezing, unresponsive scripts, non responding windows and browser crashes.
At the time of writing I have rebooted after making those changes so I have yet to discover whether they solve those problems.
However, I have chosen o write now as I already am re-experiencing the first problem I encounter when I boot my PC, i.e. Firefox takes three minutes at least to start after I click the icon. Once it has started, however, ne Firefox windows open promptly.
How do I solve this? I rememebr a time when Firefox opened with lightning speed whenever I clicked the icon.
Thank you for your valued help and interest.
Patrick O' D.

Hello Patrick O' D,
In my experience t here are two different problems with the speed of firefox on startup
# your os and setup
# firefox - and exactly what you use with it
Some factors will be down to your OS and for instance what does start up initially, many of those factors will affect other programmes/applications and not only firefox.
Some other factors depend on Firefox and how you set that up, I always like to have the option to using Firebug but realise it cold clash with other software or slow down firefox startup so I only enable it as I need it. see for instance: https://addons.mozilla.org/en-US/firefox/performance/

Additional firefox window opens with "dangerous site"

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