Just installed Firefox on Windows XP. It is chewing up 99% of CPU? Unusable! Going back to Chrome.

Cannot do anything. Cannot get to turn off the plugins as I cannot do anything with Firefox using 99% of CPU the hourglasss is controlling the process.

'''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link}
While you are in safe mode;
Type '''about:preferences#advanced'''<Enter> in the address bar.
Under '''Advanced,''' Select '''General.'''
Look for and turn off '''Use Hardware Acceleration'''.
Poke around safe web sites. Are there any problems?
Then restart.

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I just installed Firefox on Windows 8 and my menus are HUGE.

This is what all of my menus look like: http://i.imgur.com/srSdqLY.png )
I've tried reinstalling firefox, erasing all the settings, addons and so on but the menus stays the same.
It's getting extremely frustrating and I wonder if there's any way that I fix it?

I managed to fix it by changing my system visual style.
I've replaced system files to be able to use 3rd party themes and one of these themes were causing the menu bug. :)
Thanks for the help

Just installed Firefox 3.6. Firefox will not start and Firefox safemode does not start either. Using Task manager I do not see if started either. If I create a new profile and start from that window, Firefox starts up. I see no error windows/messages. I d

Just installed Firefox 3.6. Firefox will not start and Firefox safemode does not start either. Using Task manager I do not see if started either. If I create a new profile and start from that window, Firefox starts up. I see no error windows/messages. I do have it listed in my Firewall as an exception program with Permit All. What is happening?
== This happened ==
Every time Firefox opened
== After removing Firefox and Reinstalling it. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB6.4; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; MS-RTC LM 8)

If that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)
See http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
See also [[Basic Troubleshooting|#Make_a_new_profile|Basic Troubleshooting: Make a new profile]]

I just installed Firefox on a new HP 600-1120 with Windows 7 and it is only running in "safe" mode. Why? How do I get it to run in "regular" mode? How does "safe" mode differ?

I just installed Firefox on a new HP 600-1120 with Windows 7 and it is only running in "safe" mode. Why? How do I get it to run in "regular" mode? How does "safe" mode differ?

> So now my question is, how can i fix this problem?
Use the Toshiba recovery disk or the Toshiba HDD recovery option.
If you dont have the Toshiba Recovery disk try the HDD recovery:
http://aps2.toshiba-tro.de/kb0/HTD1303440001R01.htm
This works only if the recovery image files from Toshiba are still on the HDD:
If you installed the system using another disk as Toshiba recovery disk, this recovery option will not work.

I just installed firefox as a broser. everytime I click on any website a pop up window named "java script application" and states "exc in ev handl:type error: oSAPLg. o root. log is not a function"

I just installed firefox as a broser. everytime I click a website the following pop up window opens. "exc in ev handl: type error: oSAPLg.o root. log is not a function. How do I correct this.

Please see solution in http://kb.mozillazine.org/Problematic_extensions
for "McAfee Site Advisor".
(Windows): For best results you should uninstall '''McAfee Site Advisor''' from Control Panel > add/change programs (Programs and Features). Reboot the system. Then Reinstall from http://www.siteadvisor.com/ and reboot the system. When installing refuse other suggested (crapware) applications.
<br><small>Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.</small>

I just installed Firefox 5. How can I remove the Bing search from the address bar? I don't want to see Bing at all.

I just installed Firefox 5. How can I remove the Bing search from the address bar. I don't want to see Bing at all. I tired the Firefox options, right-clicking on the search field and the toolbar selection drop-down but could not find a way to get rid of that unwanted search window.

*'''at the bottom of firefox''' there is a weird looking greenish circle with a lightning bolt in it*
1. click it and hover over to '''PREFERENCES'''.
2. click the second circle that say's '''BING.'''
3. '''Un-check''' both boxes.
4. you're done :)
Note: it's not going to show the google symbol encrypt when you open a new tab it's just going to automatically use google as a search engine.

I just installed Firefox and am stuck on the "Choose a profile" page because when I click "Create a profile" nothing happens.

I just installed Firefox and it is stuck on the "Choose a Profile" page and will not load...frozen. When I click on "Create a Profile", nothing happens. Anyone have any suggestions?

Try to delete the profiles.ini file to force Firefox to create a new profiles.ini file and a new default profile.
*http://kb.mozillazine.org/profiles.ini_file
* C:\Users\<user>\AppData\Local\Mozilla\Firefox\Profiles\<profile>\
The "Application Data" folder in XP/Win2K and the "AppData" folder in Windows Vista and Windows 7 and later versions are hidden folders.
*http://kb.mozillazine.org/Show_hidden_files_and_folders
See also;
*https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

I just installed firefox; when I click the icon, nothing happens.

I just installed firefox; when I click the icon, nothing happens

In case you haven't solved this by now...
Sometimes your security software will block new programs from accessing the internet. Are you getting any alerts along those lines?
Sometimes Firefox will stall during startup and never display its window. In that case, you may need to manually "kill" the firefox.exe process using the Windows Task Manager before trying to start Firefox again.
You can display the Task Manager by pressing Ctrl+Alt+Esc. Windows 8.1 has a different display than Windows 7, so I have to go by memory. If you see a tab named Applications, check that one first. Then check Processes, and finally check Details. If you find Firefox or firefox.exe on any of those tabs, select it and End Process (or other action to shut it down).
After you are done with the Task Manager, try starting Firefox up again.
See also: [[Firefox won't start - find solutions]]

Just installed Firefox 18 and now when I hover over bookmarks they get blacked out, why ?

Just installed Firefox 18 and now when I hover over bookmarks they get blacked out, why?
Windows 7 ,Lenovo G580, 8Gb Mem, 4GB AMD radion graphics card, no other changes other than installing FF18

in this case the obvious other candidate would be an incompatible extension - can you disable them one-by-one to find out which one is interfering.
alternatively you could try to reset firefox (this will keep your bookmarks & passwords): [[Reset Firefox – easily fix most problems]]

Just installed itunes on windows 8 and it will not open

i just installed itunes on windows 8 and now it won't open

Okay.
Doublechecking. Have you worked through the following troubleshooting document?
iTunes for Windows Vista, Windows 7, or Windows 8: Fix unexpected quits or launch issues

How do I install Firefox with Windows 7?

I have Windows 7 and after I downloaded Firefox to my computer and tried to install it a message pops up asking me to log in as administrator or my user name. Since I am the administrator and never set up a password, I try to log in with my user name. Logging in with my user name and password won't work, so I try with the administrator and since I don't know the password, of course that fails also.

Installing Firefox on Windows
https://support.mozilla.com/en-US/kb/Installing%20Firefox%20on%20Windows
Check and tell if its working.

Is it possible to install Firefox on Windows Server 2008?

I try to install Firefox 3.6 on Windows server 2008 but it says that the file is corrupted.
Is it possible to install Firefox on Windows Server 2008?

From the Parallels website:
32-bit Operating Systems
Windows 8 with: Windows 8, 8.1 (when available)
Windows 7 SP1
Windows Vista SP0, SP1, SP2
Windows Server 2008 R2, SP2, SP1, SP0
64-bit Operating Systems
Windows 8
Windows 7 SP1
Windows Vista SP0, SP1, SP2
Windows Server 2012
Windows Server 2008 R2, SP2, SP1, SP0
I do suggest that you upgrade RAM to at least 8gig
if you haven't already.
FWIW, I currently use Win8/64 bit with Parallels on a 2011 Mini Server
using the windows environment for engineering applications and have
had no issues. I am running Mountain Lion but do not have the
Server app installed.

Having just installed Firefox my screen has gone dark. Can I brighten the screen or not use it as my main Browser?

Having just installed Firefox for the 1st time my screen has gone dark. I am on a MAC which also has Safari on it. I have made the Firefox the main Browser. Can I make my screen brighter or should I take off Firefox.

Make an appointment at the Genius Bar of an Apple store. From the troubleshooting you performed and the hotness I suspect a hardware proboem.
Apple Retail Store - Genius Bar
If under warranty and not bused Apple will exchange it at no cost. Otherwise
Apple will exchange your iPod for a refurbished one for $99 for 16 GB 5G and $149 for the other 5Gs. They do not fix yours.
Apple - iPod Repair price

I just installed firefox 4 and it is not launching, plzz Help!

i just installed firefox 4 and it is not launching, Plzzz Help!

To get the new UI you need to hide the menu bar. To do that in the View menu select Toolbars, then click on the "Menu Bar" entry.
If you need access to the menus you can press either Alt or F10 to temporarily display them.

Downloaded and installed firefox on windows XP, firefox wont start

downloaded and installed firefox on windows XP, click on firefox icon and nothing happens!

Also to be sure you need at least Windows XP Service Pack 2 if not 3 (XP3) as Firefox since version 13.0 will not work on XP1 or older.
https://www.mozilla.org/firefox/33.1.1/system-requirements/

Just installed Firefox on Windows XP. It is chewing up 99% of CPU? Unusable! Going back to Chrome.

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