I installed Chrome and uninstalled it, and Firefox will only open in Safemode after this.

I installed Chrome, then I uninstalled chrome, and now Firefox only opens in safe mode. I have XP, and Firefox just updated itself to 3.6.8 despite the safe mode. I still use it functionally, but it's annoying. Yes, I am sure it is in safe mode, because the little box that says it is in safe mode pops up offering to disable things. It does not affect how Firefox runs at all (well, oddly, FF seems more stable, but it might have been the upgrade, too).
== This happened ==
Every time Firefox opened
== I installed Chrome.

i deleted the rdf and now the first window only (and any tabs in it) are maximised. i found this in the rdf
<RDF:Description RDF:about="chrome://browser/content/browser.xul#main-window"
screenX="4"
screenY="4"
width="1008"
height="461"
sizemode="Normal" />
i tried changing normal to maximised; no effect. either i need also to change the numbers (to match a maximised window) or ff ignores this. i want to be able to open different sites in different windows, and not have to maximise them manually. ff never used to be broken, why break this? what possible security flaw was fixed by screwing up ff to never open maximised unless u hack it or delete certain config files?

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Firefox will not open, it gives me this cod and would not turn off, Error on switching in renew: NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref] id: none

I restored my computer to earlier time and I did an other restore but to latest time and since then every time I click on Firefox short cut this window comes up with the same cod and I can not turn it off unless turn off or restart my laptop, I did delete the Firefox few times and reinstalled it but did not change anything, still I get the same cod,
Error on switching in renew:
NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref]
id: none

Some how I solved my problem by opening a user account and downloading Firefox 4.0 beta and installing it, I did try it, worked fine, so I did close the user account and did go back to my own account(switched user), the main page that I had problem with Firefox which would not open, I dabble click on Firefox it start working again!! I hope that solves your problem too.
firefox will not open, it gives me this cod and would not turn off, Error on switching in renew: NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref] id: none

I have upgraded my laptop with Adobe X1 and now all PDF's will only open as en ecyrpted word doc, pl

I have upgraded my laptop with Adobe X1 and now all my existing savedPDF documents will only open as an encryted word document, HELP! Please!

Hi Juliea,
I think the file association for PDF is not correct. Instead of double clicking the file to open, Please try below mentioned
right click on the file and select open with..
Select Choose Default Program
Select Adobe Reader from the list(If it is not in the list then navigate C:\Program Files (x86)\Adobe\Reader 10.0\Reader and select AcroRd32.exe)
Remember to select the check box"Always use the selected program to open this kind of file"
Click ok
~Pranav

Firefox will not open new window after clicking on link

if I click on a hyperlink in an email message (Apple Mail) then Firefox will not open (if not running).
== This happened ==
Every time Firefox opened

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).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]

Firefox will only open once from desktop and won't open new tabs or windows

When I clicked on Firefox's desktop icon this morning it took a solid 5 minutes for the browser window to open, and at that time I just chalked it up to my computer being slow.
Once it did open I soon encountered the first problem: when I clicked on "Open Link in New Window" or "Open Link in New Tab" nothing happened. Subsequently, when I did navigate to a website I was unable to click on any links whatsoever. I closed the window and tried to restart Firefox which is when I ran into the second problem: it wouldn't open. I opened the Task Manager and terminated firefox.exe, attempted to open via both the desktop icon and program folder but had no luck. If I restart my computer I'm able to open just the one browser window but with the same results of the first issue I mentioned.
I've tried all of Mozilla's troubleshooting tips in the "Firefox will not start" section with no luck. I've also uninstalled then reinstalled with no luck.
Help!
Version: 3.6.3 - Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3
OS: Windows XP
== This happened ==
Every time Firefox opened
== June 13, 2010 ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.2; .NET CLR 2.0.50727)

'''Kill Application'''
In Task Manager, does firefox.exe show in the '''Processes''' tab?
See: [http://kb.mozillazine.org/Kill_application Kill Application]
'''Causes and solutions for Firefox hanging at exit:'''
[[Firefox hangs]]
[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit]
[[Firefox is already running but is not responding]]
'''Safe Mode'''
You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode. When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". Test to see if the problem you are experiencing is corrected.
See:
'''[[Troubleshooting extensions and themes]]'''
'''[[Troubleshooting plugins]]'''
'''[[Basic Troubleshooting]]'''
If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it by enabling '''one at a time''' until the problem reappears. '''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

Firefox will not open in Vista after upgrading to 9.

I updated FF to ver. 9, now it will not open at all. I have tried downloading it and re-installing, but I get an error message that: FF is already running and that it must be shutdown first. Then I tried to uninstall FF in completely, but again I get the message that it is "already running and must shutdown first." Also, I have tried to open FFin safe mode, but that does not work either. Vista all my AV is up to date. Side note IE9 and chrome work fine. Thanks.

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
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
See also:
*https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

Firefox will only open websites via url link, does not even attempt to connect through the address bar.

I can only open Firefox websites by using a url link. If I try to type something in the address bar it will not even attempt to load the page, no loading circle, no error or no connection message. I'm at youtube.com and I type in google.com and slap ENTER. Nothing happens. Nothing. I slap the ENTER key a couple more times to similar effect. I can open blank new tabs, but can't get the address bar to work. I can right click videos and have them open correctly in new tabs or windows, but the address bar refuses to do anything.
Internet Explorer works perfectly fine though. Despite the ads.
I've updated reinstalled, disabled my firewall, restarted firefox, restarted my computer, hasn't accomplished diddly jack squat. If anyone has any idea what's going on here I would highly appreciate your help.

Hello,
Try clicking on Tool --> Options --> Advanced --> General tab. Uncheck "Use Hardware Acceleration... ". Do you have any add-on like avg safe search installed?
Hope that helps.

Ever since rev. 6.0 Firefox will only open in safe mode; it is "incompatible" according to Win7.

Firefox won't open but is listed on Task Manager as running. It must be closed from there in order to run in Safe Mode. I tried running it in XP emulator with the same result

Hit the '''Alt''' key to show the Menu bar, then open View > Toolbars and select Menu bar and Navigation bar, so they have a check-mark.

After working fine for years, this morning lost homepage, settings and themes. Now, Firefox will not open at all.

I've had Firefox for years. This morning, my theme, homepage, and settings were gone and I could not restore them. Now I can't open Firefox at all, no matter what I try.
== This happened ==
Every time Firefox opened
== This morning

Firefox keeps that info in a separate folder called your "profile". It's possible that a new profile was created. But does your original still exist? Try starting Firefox in the profile manager to see if there are other profiles listed. See [[Managing profiles]]

Firefox will only open once

I can run Firefox once per profile & then it won't start again. I have to make a new profile to get it to open again. Alternatively, I can start Safe Mode and then exit after the prompt with the options to enter Safe Mode. After that I can start Firefox normally, but only once. Then I have to either create a new profile or get the prompt to enter Safe Mode. Without the Safe Mode trick profiles can only be used once before Firefox fails to start again. I already tried to treat this as an add-on problem, which is when I discovered that it was the fact that I ran Safe Mode, rather than because I disabled any add-ons, that made the difference. I have also uninstalled and reinstalled Firefox more than once.
== This happened ==
Every time Firefox opened
== This is a relatively new build

Do you get any error messages if you try to start Firefox a second time?
Can you restart Firefox with that same profile after a reboot of the computer?

Firefox will only open in safe-mode?

Hello community,
I've been having this weird problem lately... Well as I try to open Firefox an error window shows up saying that Firefox chrashed and that it has to be restarted, as soon as I restart Firefox, the message shows again, and only after few tries I'm allowed to start Firefox in safe mode by clicking on a button showing up on another error window.
I already have tried to:
-Disinstall and reinstall Firefox
-Disabling all plugins (won't allow me to manage extensions in safe-mode tough)
-Deleting the *-journal files
Any ideas? :'(
P.s.: I'm running Firefox 20.0 on Windows 7, the problem showed up really unexpectedly, didn't install anything new

Thanks for the very fast reply, the problem is now gone :)
Here are some crash IDs
* a9e94ddb-3c1d-49b3-84db-1fd44f9cea22
* 4c41f30c-45e1-4e63-afb4-20dfc72a383b-flash2
* 4c41f30c-45e1-4e63-afb4-20dfc72a383b-flash1
* 4c41f30c-45e1-4e63-afb4-20dfc72a383b-browser
* 4c41f30c-45e1-4e63-afb4-20dfc72a383b
* bp-0c055f01-1819-4984-9bc1-dc7862130402
* bp-0c055f01-1819-4984-9bc1-dc7862130402
* bp-61ea0cac-5aab-4226-a15e-12fe72130402
* bp-d5d281e4-c2e8-41e2-bed1-f037e2130402
* bp-6a16ce7e-f916-471c-ac80-0a1d22130328
* bp-e0227e29-dd8b-442f-8664-0bd902130327
* bp-a9591ec8-2d40-4186-9c51-9e9572130327
* bp-88af1dec-9ece-4074-93b2-ec0092130327
* bp-b0d0b220-d608-4ea6-8608-fde792130327
* bp-ab265970-c5f5-4395-ac3e-1805e2130327
* bp-f895357e-f328-4991-84c9-d71a72130327
* bp-40355fcf-da12-4d27-9da6-4374a2130326
* bp-9c3fce69-6dad-41c4-ac88-052172130326
* bp-e600cff9-2c52-4c7e-85e6-0733a2130326
* bp-de9274e2-3250-4985-94a4-5cd882130326
* bp-a8a4477c-becb-481d-a71d-f8cdf2130324
* bp-8cad2d3e-9c47-42ab-85db-258d12130324
* bp-e565e27d-184a-4ab3-b604-47ecd2130324
* bp-b4a56400-9ee2-477f-8fa4-45dfc2130324
* bp-beb921ad-cf61-4428-b0da-0f7fe2130324
* bp-87359e26-766c-4c9d-a427-d5a4f2130323
* bp-6ef11366-da1e-45f0-b934-bffff2130323
* b444527b-bb43-48ab-a466-f97c8db3ec80
* a071c76e-c46a-4684-95ed-82e1b798efa3
* 9f64118f-dcd6-4401-84e7-7c13a10aecd1-flash2
* 9f64118f-dcd6-4401-84e7-7c13a10aecd1-flash1
* 9f64118f-dcd6-4401-84e7-7c13a10aecd1-browser
* 9f64118f-dcd6-4401-84e7-7c13a10aecd1

Firefox will only open once per login

This started acting up i think around when i updated firefox when i was opening it. It only allows me to have one firefox window open. The tabs work find but i can't move tags to new windows, can't get on chat sites cause they require another window to open and i have to restart my computer if i close firefox window. I've cleared the cookies on here but doesn't seem to help.

You can make a copy of the Firefox desktop shortcut and open the Properties of that shortcut via the right-click context menu.
You can add a space and the "-new-window about:blank" text without quotes to the current command (target) line to open the about:blank in a new window if you use that desktop shortcut to launch Firefox.
Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.
Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Firefox will not open after unlocking Sempron

After upgrading to a new motherboard and unlocking Sempron processor, Firefox will not open. I have tried Firefox (safe mode) and rolled back to a previous version, but to no avail. It worked fine when I ran the Sempron 140 as a single core (even overclocked to 3.17ghz) on Biostar A785GE motherboard. I cannot find a crash ID to link to.
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; (R1 1.6); Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; SLCC1; OfficeLiveConnector.1.5; OfficeLivePatch.1.3)

Maybe you restored to a version of Firefox that crashes or still have a virus problem.
(irrc some Firefox versions specifically had problems after Windows restores)
Follow up checking for malware and then try re-installing Firefox. I would also suggest you make a copy of your [[profiles|profile]] including all folders and sub files and put it somewhere safe as it may assist in restoring your bookmarks and information.
See also
*[[backing up your information]]
* [[is my firefox problem a result of malware]]
* a typical post about malware checks: [/questions/914980#answer-302372]

Firefox will not open because of this error message...[JavaScript Application] Error on switching in renew: NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref]

when this error box opens the only way to close it is to shut the firefox process

Some how I solved my problem by opening a user account and downloading Firefox 4.0 beta and installing it, I did try it, worked fine, so I did close the user account and did go back to my own account(switched user), the main page that I had problem with Firefox which would not open, I dabble click on Firefox it start working again!! I hope that solves your problem too.
firefox will not open, it gives me this cod and would not turn off, Error on switching in renew: NS_ERROR_UNEXPECTED, Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref] id: none

I installed 4.0 and now firefox will not open, though it is running, I have uninstalled and re-installed and it still will not open?

I installed 4.0 and now firefox will not open, though it is running, I have uninstalled and re-installed and it still will not open. Not sure why this is happening

If you use ZoneAlarm Extreme Security then try to disable Virtualization.
*http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
See also:
*[[/questions/880050]]

I installed Chrome and uninstalled it, and Firefox will only open in Safemode after this.

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