Firefox will not run properly now

I really need help getting my Firefox to run properly. Earlier this evening I downloaded the epub reader addon from the Firefox addon website. After that I noticed my Firefox was using yahoo as the search engine instead of Google. I've tried the obvious set it to Google but it kept going to Yahoo. I also uninstalled the addon but it still kept searching on Yahoo. So I searched for solutions online. Then I tried the Help>Troubleshooting Information Restart Firefox. This when all the problems began.
Now every time I go to Google.com or search on the Google toolbar I get the This Connection is Untrusted message
Screenshot: http://imgur.com/BttGmGU
Also when I go to certain websites like the mozilla firefox add on website it will not load properly
Screenshot: http://imgur.com/oIz0XgE
Can anybody help me with this? I've tried the obvious options like uninstalling and reinstalling but my Firefox refuses to perform normally. Also I still have the old Firefox Data. Is there a way I can restore that data?

Check out why the site is untrusted (click "Technical Details to expand that section) and if this is caused by a missing intermediate certificate then see if you can install this intermediate certificate from another source.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.
You can see more Details like intermediate certificates that are used in the Details pane.
If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".
Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.

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Firefox will not run after System restore or running in compatibility mode for windows 98. How do I fix this? I already tried all other solutions on this site.

I was running Firefox fine just yesterday. I screwed up the registry a litle while removing an installed program completely, so I restored the system and everything appeared to work fine. I then decided to play an old video game, Return to Krondor, which was made back in 1998, so I ran the program with no other programs running in compatibility for windows 98. After finishing the game, I closed it and put the computer in hibernation mode. I come back today and firefox will not run at all. It is not running in the background and there are no programs running. There are no services running which could interfere with it. I think somehow Firefox may think I'm in compatibility mode still, but I have no idea.
I'm running windows Vista 32 - bit with an AMD 2.4ghz processor, 4gb ram on an Emachine computer. I have already tried system restore, restart, processes etc. Nothing works. I can still run Internet explorer and all other programs.

The person that I was assisting, has Windows 7 which has 64 bit system. Her browser was IE 10.
Was IE11 ever offered (or installed) via Windows Update?
Is her computer currently fully-patched at Windows Update?
Is Adobe Shockwave Player v12.1 (or higher) installed on her computer?
Is Adobe Flash Player v15.0.0.189 (or higher) installed on her computer?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Troubleshoot Shockwave Player installation for Windows
http://kb2.adobe.com/cps/403/kb403264.html
You will find support for Shockwave Player in this forum:
http://forums.adobe.com/community/webplayers/webplayers_shockwave
~Robear Dyer (PA Bear) MS MVP-Windows Client since 2002 Disclaimer: MS MVPs neither represent nor work for Microsoft

I just put itunes upeate 11 on and now itunes will not run. I get an error that sys iTunes has stopped and windows is sutting it down. I reinstalled 10.7 and it will not run eather now.

I just put itunes upeate 11 on and now itunes will not run. I get an error that sys iTunes has stopped and windows is sutting it down. I reinstalled 10.7 and it will not run eather now.

C Mawle wrote:
Thanks. I have followed all the instructions as recommended and nothing has worked so it looks like the restore/update may have been interrupted - would loss of internet connection do this?
Yes it would, possibly even brick it.
Have successfully connected my ipod nano with iTunes so looks like the device driver is working.
Can I use my ipod nano USB connector to check?
It is not much help to you, since the device that you need still not recognized.
Anyway looks like I may have to swallow the loss of data. Have set-up a call for tomorrow with Apple support so will wait until after this before doing the factory restore!
Good luck, but if you expect miracle from that call good luck again.

Gimp will not run properly

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If I try to open a graphic with Gimp, it loads but the graphic is not visible and only the Gimp menu is visible in the menu bar. It shows up as running in the dock.
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Hello Francis,
Did Gimp ever load properly? On first load, it should have gone through an installer within X11. Also, I've noticed that my image windows start up hidden. There also may be a bug in which clicking on the Gimp app icon in the dock itself won't bring the windows forward, so you have to use the X11 icon instead. Try using Expose to show all windows in all applications to see if they've opened but sort of "off-screen."
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After refomatting HDD, reinstalling Vista plus service packs, recovering files from Microsoft backup and installing new copy of Firefox 3.6, Firefox will not run. Have deleted all old M0zilla profile folders and reinstalled Firefox again to no avail.

After computer would not boot and could not be repaired, I reformatted the HDD, reinstalled Vista plus all service packs and updates, recovered files from Microsoft backup and installed new copy of Firefox 3.6. Firefox will not run.
I have deleted all old M0zilla profile folders and reinstalled Firefox again to no avail.
After intallation was completed, the automatic startup just placed a small box on the screen "Import wiz". This just sat there with no activity. After I closed this box, none of the Firefox start buttons would open the program -- just the blue rotating icon for about 2 seconds then nothing.

Hi,
Please try to rebuil the WMI repository.
For detailed information, please refer to the blog below,
http://blogs.technet.com/b/askperf/archive/2009/04/13/wmi-rebuilding-the-wmi-repository.aspx
If issue persists, due to sfc doesn't work, could you try to repair your system with the installation disk?
Best Regards.
Steven Lee
TechNet Community Support

I have a copy of Web Premium CS3 which was installed on a Windows Vista PC. I have a new Windows 7 PC and the installation disc will not run properly. The installation begins and then asks for the CS3 disc to be inserted. If I re-insert the CD I just g

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Use the download version:
Download CS3 products
Mylenium

Firefox will not run on download

firefox will not run on my computer

Try Scan your PC:
*[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Problems caused by malwares]
Case the problem persist try disable the McAfee only for test, because in Brazilian Forum other user had the same problem that yours and the problem was cause by McAfee

Firefox will not run except on new download.

Firefox will not start under any circumstance from any shortcut, nor when started under Administrator or in safe-mode or with all apps disabled. It will start after a new download but only once. I cannot access profile manager from start/run, each time I get a 'Parsing error' message. I have tried basic removing and also removing complete with all profile details. I have performed re-starts after deletion and before and after re-installing. I have tried backdating the computer many times to different dates and the best result is an 'XML error' message on re-start attempt. Internet Explorer still works but frequently with 'Error on page' message. I have Mcafee installed but have had for years with no previous problems.

Try Scan your PC:
*[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Problems caused by malwares]
Case the problem persist try disable the McAfee only for test, because in Brazilian Forum other user had the same problem that yours and the problem was cause by McAfee

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Any thoughts?

These are the specs of the machine which DOES NOT work.
Operating System
Windows 8.1 Pro 64-bit
CPU
Intel Core i5 2500K @ 3.30GHz 53 °C
Sandy Bridge 32nm Technology
RAM
8.00GB Single-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard
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Graphics
VX2433wm (1920x1080@60Hz)
VX2433wm (1920x1080@60Hz)
1023MB NVIDIA GeForce GTX 550 Ti (Gigabyte) 38 °C
Storage
1397GB SAMSUNG HD154UI ATA Device (SATA) 29 °C
465GB Western Digital WDC WD5000AAKS-00TMA0 ATA Device (SATA) 38 °C
1863GB Western Digital WDC WD20 02FAEX-007BA0 SCSI Disk Device (SATA) 37 °C
931GB Samsung STORY Station 3 USB Device (USB (SATA)) 41 °C
2794GB Western Digital WD My Book 1140 USB Device (USB (SATA)) 37 °C
931GB Western Digital WDC WD1002FAEX-00Z3A0 ATA Device (SATA) 38 °C
931GB Western Digital WDC WD10EARS-22Y5B1 ATA Device (SATA) 37 °C
1863GB Western Digital WDC WD20EADS-32S2B0 ATA Device (SATA) 37 °C
465GB Western Digital WDC WD5000AAKS-00TMA0 ATA Device (SATA) 37 °C
698GB SAMSUNG HD753LJ ATA Device (SATA) 30 °C
1863GB Western Digital WDC WD20 02FAEX-007BA0 SCSI Disk Device (SATA) 37 °C
931GB SAMSUNG HD103UJ SCSI Disk Device (SATA) 37 °C
1863GB Western Digital WDC WD20 02FAEX-007BA0 SCSI Disk Device (SATA) 37 °C
14GB Lexar SD USB_3_0 Read USB Device (USB)
Optical Drives
ASUS DRW-1814BLT ATA Device
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High Definition Audio Device
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Windows 8.1 Pro 64-bit
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I hope this helps!
many thanks

Adobe flash 11.01.152 is crashing and firefox will not close properly

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I'm running Windows 7 and have all the latest updates.

It is not generally advised to install software in Windows Safe Mode. Only a small subset of the Windows operating system is loaded in Safe Mode. Some software will not install at all in Safe Mode. Some users installing software in Safe Mode have ended up with problems "down the road".
If you can not install software in regular Windows mode, that '''''may''''' indicate a problem with your Windows installation which needs to be investigated, sometimes by a professional.
You may sometimes be advised to un-install in Windows Safe Mode when a program will not otherwise un-install, but the un-install is not as complete.
(edited by SafeBrowser to present in more general terms)

Firefox will not close properly at the end of a session.

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See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

I have vista operating system - i have upgraded to firefox 5 and firefox will not run. i have tried 3 times. HEEEllllllllllllllllllllpppppppppppppppp

I have vista on my desktop.
I installed firefox 5 and it will not open up.
I uninstalled and re-installed 3 times.
So I had to go back to firefox 4.
Please tell me what i need to do to get firefox 5 to run.

You can install a portable Firefox (ESR) version to access websites that do not work with the current Firefox release.
*http://portableapps.com/apps/internet/firefox_portable
*http://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox,%20Portable%20Ed./
*http://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C%20P.E.%20Legacy/

Firefox will not load up now that I have switchede from dialup to broadband

I have Gateway with Vista Ultimate. Main ISP is AOL. After AOL I have always gone to Firefox. Now that I recently switched from dial up to broadband with ZoomTown in Cincinnati OH Firefox will no longer load up. Help, please.

Lavoice wrote:
..... Then i scrollover to computer and it will not download librairy Home sharing is on
This is a problem with home sharing, you are not going to have to re-encode all your CD's.
The following article(s) may help you.
Troubleshooting Home Sharing
Troubleshooting Wi-Fi networks and connections
Recommended Wi-Fi settings
Wifi Diagnostic Software (for Mac users)
You may also find some help on this page, where I’ve collected some of the more unusual solutions to network issues.

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I enabled Java, added WebEx to all secure sites and performed every possible check known to man. This is on your end FireFox.
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I will not pretend to know any answers to your problems, but I do wonder if you realise Firefox did decide to produce and support an Extended Stability Release, unfortunately this is NOT going to be based on Firefox 3.6. but on Firefox 10.
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Firefox will not run properly now

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