See How to install Firefox on Windows

I found an answer to what can cause my problem, and it says to close or disable programs such as Spybot. One: How do I disable or close Spybot? Two: I also found the 'run administrater' button. It says I should click that to help me out. I am able to do that but instead of saying "Are you sure you want to run this program?" it just says "continue" and after that, nothing happens. So again, how am I able to re-download Firefox 5.0.1?

I found an answer to what can cause my problem
Where did you find an answer? Could you post a link?

Anyway, to answer your first question, see http://www.safer-networking.org/en/howto/disable.html

I don't understand the second question but if you have downloaded the Firefox Setup 5.0.1.exe file from www.mozilla.com and saved it to your computer, just double-click the file to start the installation. In case it helps, you can try right-clicking the setup file instead, then select "Run as administrator".

You could also try a clean install by first looking for any existing "Mozilla Firefox" folder, usually in C:\Program Files or C:\Program Files(x86), and then deleting that folder before running the installer, as suggested here:

• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall
• https://support.mozilla.com/en-US/questions/796567

https://support.mozilla.com/en-US/kb/Software%20Update%20Failed#w_run-as-administrator (copy/paste if link doesn't work) It is where it says 'run as administrator' and 'close other programs'.

I was actually able to do the update yesterday night, but now everytime I click on the firefox icon, it does not load at all. It used to say: Firefox crashed. But now nothing appears. Is this already a problem? Or is it just my computer not working?

Try restarting the computer. Does Firefox start now?

If not, see http://kb.mozillazine.org/Browser_will_not_start_up under "Windows specific problems" ... you may have another program installed such as ZoneAlarm ForceField that is causing the problem, if you updated Firefox with it enabled. The fix for that is to do a clean reinstall (see my earlier post) with all security programs turned off.

Something else you might try, would be starting Firefox in Diagnose Firefox issues using Troubleshoot Mode by holding down the shift key while starting Firefox. If Firefox starts in Safe Mode, post back for more help or see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.

okay, thank you. I'll try to do the second one, if not then I'll do the first option. Hopefully one of those will work. . . (No, restarting the whole computer does not work, I've tried 5 times with that.)

I was wondering, the only thing I usually update is firefox. Whenever I am asked to do important downloads I skip it, could that be the cause of making Firefox crash?

I did a scan on my computer using the above link you gave me, and it said everything was fine. Safe mode didn't work either.

If Firefox is still crashing on startup after you turn off all security software and do a clean reinstall , see Firefox crashes when you open it, get a crash report, if possible and post the link here.

Whenever I am asked to do important downloads I skip it,
What important downloads? Do you mean important Windows Updates? It's important to keep Windows updated to fix security vulnerabilities , even if you are using security software. You do have an up-to-date antivirus program and a firewall enabled? Spybot Search and Destroy is not a substitute for an antivirus and firewall protection.

It's possible you have malware on your computer that is causing Firefox to crash (and Internet Explorer problems, too, since you said IE is slow). See Troubleshoot Firefox issues caused by malware for suggestions on dedicated malware scanners and forums that specialize in malware removal.

I think I'll scan for malware since I had already done a clean reinstall.

As for the important updates, I spent a whole day updating windows and some other stuff and firefox still kept crashing.

I tried to open Firefox in safe mode again, and surprisingly it worked. I followed the steps here where it says, 'Test for faulty extensions': https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes (Turns out, when you told me to do this, I used different kind of safe-mode)

Because I used firefox in safe mode, all add-ons are automatically disabled. It will not let me view my add-ons, so I can't figure out which add-on(s) are causing the problem.

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")

Hi,

I was able to find the box where it tells me to permanently "Disable all add-ons" on the link you provided above, but after I clicked on 'save changes and restart' button, nothing happened.

So, I assumed that it already saved the changes but couldn't restart and exited out. After that I tried clicking Firefox open again and it still said it kept crashing. I'm guessing it wasn't able to save my changes after I had already click to save the changes.

I clicked on all the options in the Firefox safe mode box after guessing the add-ons weren't the only problem, but again nothing happened after I clicked the 'save changes and restart' button. When I clicked on Firefox it was still crashing.

Is there any other alternative solution?

Oh, I found out that it did work since I saw it affect Firefox safe-mode. So if it's not an add-on then what is making my firefox crash all the time? Are there anymore suggestions?

In Firefox 4 and later Safe mode disables extensions and disables hardware acceleration.

• Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

If disabling hardware acceleration works then check if there is an update available for your graphics display driver.

Just to repeat and clarify what cor-el said:

If Firefox starts when you open it in Diagnose Firefox issues using Troubleshoot Mode and click "Continue in Safe Mode", but it does not start when you click the button to "Disable all add-ons" and "Make changes and restart", then you should see if hardware acceleration in Firefox is the problem.

To turn off hardware acceleration, start Firefox in Diagnose Firefox issues using Troubleshoot Mode again and "Continue in Safe Mode". Open the Advanced panel - Accessibility, browsing, network, updates, and other advanced settings in Firefox then go to the General tab and click inside the box that says, "Use hardware acceleration when available", so that it is cleared. You then have to close Firefox and restart it normally, to see if it solves the problem. This is explained in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article, in the "Turn off hardware acceleration" section.

If Firefox works after you restart it with hardware acceleration turned off, you may wish to update your graphics driver, so that you can re-enable hardware acceleration in Firefox. See Upgrade your graphics drivers to use hardware acceleration and WebGL

I have already turned the hardware acceleration off and it still didn't work, so I tried to update it but the update failed. But after opening Firefox about three times(which all ended up crashing) I tried the to open it the fourth time and it didn't crash, but it didn't open either... Anyways thank you all for your help, but I think I'll just give up on Firefox and use it just on safe-mode. I appreciate your patience with me. :)

Sorry to hear. You've already gone through the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems steps (right?) and you did a clean reinstall and checked for malware (right?) so there is nothing else I can suggest except to try and get some crash reports and post the links or crash IDs here. See the "Getting help with your crash" section in Troubleshoot Firefox crashes (closing or quitting unexpectedly) and the "Getting your crash report" section in Firefox crashes when you open it.

Which security software (firewall) do you have?

You can also do a malware check with some malware scanning programs.
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

Correct AiceWyman, I have done all of them.

Maybe I do have malware, I'll try scanning it with Spybot Search&Destroy. . .

Before I do though, it says that Anti-Vira(I'm not sure if that's how you spell that) is not compatible with my computer so I don't know if that has anything to do with Firefox(pretty sure not).

Yes, but what antivirus/firewall software are you using besides Spybot Search and Destroy?

Open Control Panel and go the System Security "Action Center" (or type "Action Center" in the Start Search box), look under Security and tell us what Network Firewall, antivirus protection and malware protection you have, and if it is up-to-date. See http://windows.microsoft.com/en-US/windows7/What-is-Action-Center for details and a screenshot.

In any case, try doing a new malware check with some of the other programs cor-el listed above. Finally, IF AT ALL POSSIBLE, open Firefox again in Diagnose Firefox issues using Troubleshoot Mode and go to about:crashes (type that into the address bar and enter) and post some of the crash reports here (you can copy the links).

I have McAfee(as firewall and Malware protection, though it is currently out of date and turned off as firewall) and Windows Defender. And IObit Security 360 as spyware protection too.

But I'll check my crashes again from the past week and write the link down here:

Basically they all say the same thing so I guess I'll just put one down:

https://crash-stats.mozilla.com/report/index/443275ae-b7af-47e5-98d4-2c8242110801 (copy/paste if it doesn't work)