Why does Firefox constantly use 50-60% of my processes in Task Manager when I am not active on line?

This is a frequent (2-3 times a day) occurrence when Firefox all of sudden is using processes even when I am not actually actively using websites? I may be just reading on a page and my task usage will be over 50%. Sometimes it will be just "firefox" and sometimes "plug-in for firefox".

See if you still have the issue in Safe Mode http://kb.mozillazine.org/Safe_Mode
Maybe you have too many addons or a corrupted profile.

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Why does Firefox sometimes ask me if I want to save my tabs when I close, and sometimes it does not? I usually want to save them, so this is a pain. I'm on a Mac, OS 10.5.8

Why does Firefox sometimes ask me if I want to save my tabs when I close, and sometimes it does not? I usually want to save them, so this is a pain. I'm on a Mac, OS 10.5.8
== This happened ==
A few times a week
== don't know...

There can be various causes for this:
[[Firefox does not ask to save tabs and windows on exit]]

Why does Firefox want to update to the most current version upon starting when I have already updated?

Upon starting Firefox, often after starting or restarting my computer but sometimes after closing the Firefox browser(s) for a significant time, the program asks to update. Firefox asks this every time, and I have no idea how many times I have updated to the most recent browser version and I suspect the update is not saving correctly so the program is continually reverting to the last recent browser version.

There are no useragent prefs listed in the System Details List and extensions.lastAppVersion: 15.0.1 suggests also that you run Firefox 15.0.1.
Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 26: http://www.mozilla.org/en-US/firefox/all.html
if possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.
*Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
*It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.
If you keep having problems then also create a new profile.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Firefox is already running but not responding,No process in task manager,Restart and uninstall not useful.Profile manager error

So one day when I opened my mozilla firefox Ive got the "Firefox is already running but not responding.To open a new window,you must first close the existing firefox process,or restart your system."
So I checked my task manager but there is no process,I then checked hours in the internet to find a solution.Yes,I also checked for solutions in this site.Then,I try uninstalling and restarting,it also didn't work,Next I also tried downloading profilemanager and tried to run it but as unlucky as I can be,it also didn't work. Please help :(

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!

Why does Firefox constantly ask me if I want to run plugins when it never used to? They are all up to date.

I have Shockwave Flash 16.0 r0.
Java 11.25.2
Java Deployment 8.0.250.18.
It's rather annoying.

hello monarail, you appear to have multiple versions of the flash plugin installed - for a possible solution please refer to https://forums.adobe.com/thread/1489272

Why does Firefox constantly crash? This problem has become epidemic.

This is but one of many websites that cause Firefox to stop working.
I am using an Asus laptop, Windows 7 Home Premium, 64 bit computer.

If you have submitted crash reports then please post the IDs of one or more crash reports (bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx). 
You can find the IDs of the submitted crash reports on the about:crashes page. 
You can open the about:crashes page via the location bar, like you open a website.
See:
*http://kb.mozillazine.org/Mozilla_Crash_Reporter
*https://support.mozilla.org/kb/Mozilla+Crash+Reporter

Why does Firefox beta keep connecting to 173.194.70.* (google), even when no tabs are open and all data reporting and the built in ggl. search is disabled?

I'm worried of google spying. Connections appear in OS Monitor as ESTABLISHED TCP4 connections on port 80, even in background.

See this article for some suggestions: [[Firefox has just updated tab shows each time you start Firefox]]
See also http://kb.mozillazine.org/Preferences_not_saved and Preferences are not saved

Why does firefox (updated) on windows 7 NOT send a hotllink (must copy/paste),when using the 'send link' feature,whereas firefox on XP always sends a hotlink?

Question
why does firefox (updated) on windows 7 NOT send a hotllink (must copy/paste),when using the 'send link' feature,whereas firefox on XP always sends a hotlink? This feature has always worked perfectly on all my windows XP computers,but not at all on any of my versions of firefox on windows 7.How can i fix this? Why does it not work?

Hi,
Please check if this happens in [https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode]. You can also attach a screenshot on this page below '''Post a Reply''' > '''Add images: Browse ...'''

Why does firefox crash everytime I use it

Every time I use firefox regardless of what site Im on, it crashes every single time, I do not understand why. I have automatic updates on my computer that update once a week. I had no problems what so ever until Tuesday July 11th, after my computer updated, now I cannot use firefox for any thing. Can you please help, this is very aggravating?

EVERYONE 
Please start your own thread if you have a crash.
# Use this [https://support.mozilla.org/en-US/questions/new/desktop/fix-problems/search?search=Why+does+Firefox+Crash+everytime+I+open+multiple+tabs%3F+%28%2Fquestions%2F968746%29#summarize-question special link] if it is only after multiple tabs are opened. (Look at the related questions some may well have solutions that work for you)
#* otherwise use this quick and direct [https://support.mozilla.org/en-US/questions/new/desktop/fix-problems/form?search=Crashes+Firefox+24+%28%2Fquestions%2F968746%29&step=aaq-question link]
#Please try to post from Firefox (Obviously that may not be possible if it crashes on startup)
# Follow the prompts to provide troubleshooting information whilst you post your question.
# Include a couple of Crash IDs You will need to navigate to''about:crashes'' and look for ID s begim=nningwith '''bp-''' see [[Firefox crashes - Troubleshoot, prevent and get help fixing crashes]]
# Try Firefox in Firefox's safemode
#* see [[Troubleshoot Firefox issues using Safe Mode]]
#* does that help ?
#* If you crash in safe mode please include the crash IDs from a safemode crash
#If you have already posted in this thread, or have crashes after a opening multiple tabs you may wish to post back to confirm you have started a thread so others may see your progress.
ANYONE WITH NORTON SOFTWARE
Someone has already mentioned Norton in this thread. Please note there is a known issue with some Norton software sometimes implicated in Firefox 24 crashes. Norton themselves are asking for more information.
* Please see https://community.norton.com/t5/Norton-Toolbar-Norton-Identity/Firefox-24-still-crashes-when-the-NIS-toolbar-is-enabled/td-p/1023987
* Note Norton forum has Mixed content, you will need to disable Firefox protection when a shield appears in the location bar or you will not see the correct forum navigation. I am sure Norton are aware of this.

Why does Firefox 'remember' a login from my last session when, on both occasions, I was using "Private Browsing"?

Why does Firefox 'remember' a login from my last session when, on both occasions, I was using "Private Browsing"? How do I stop this (without clearing other data)?

Try disabling hardware acceleration. Many visual bugs can be attributed to issues with graphics drivers.
(Firefox -> Options -> Advanced -> General -> [ ] Use hardware acceleration when available)

Why does Firefox ask me always for permission to use some obscure fonts?

Why does Firefox always ask for permission to use some obscure fonts?
== This happened ==
Every time Firefox opened
== A few weeks ago

Yeah the whole "blame the OS" thing is a red herring. What the hell is Firefox doing looking on my external drives in the first place? It asks permission to use a font on another drive, but what else is it looking at outside of the Applications folder where it should know enough to mind its own business?

Why does Firefox always block any link I try to open going to a web page when I don't have pop up blocker on?

Why does Firefox always block any link I try to open going to a web page when I don't have pop up blocker on? First off they are not even pop ups....your crap blocks everything and don't save user names &/or passwords when you have it checked. Also in your tutorials about solving this issue says it has the word "OPTION" .......no, it never says option to allow you to bypass it and etc. Only thing is says is "ALLOW" . That would be nice , but the problem is it will not allow it from then on. It only allows it right then and then you have to refresh...after that to open again it blocks it again.....HOW STUPID?!!!!!
It always say that this is preventing this page from automatically redirecting to another page. THIS IS WHAT I AM TRYING TO DO...GO TO ANOTHER PAGE........I DON'T NEED YOUr BROWSERS PERMISSION TO DO THAT. THAT IS WHAT A *%#$&*(&*%$$%% BROWSER IS FOR TO GO TO OTHER PAGES......THEY ARE NOT POP UPS!!!!!
YOU STUPID BROWSER ACTUALLY BLOCKS EVERYTHING AND THAT SUX!!!
HELP!!

Are you using "Clear history when Firefox closes"?
In case you are using "Clear history when Firefox closes":
*do not clear the Cookies
*do not clear the Site Preferences
*Tools > Options > Privacy > Firefox will: "Use custom settings for history": [X] "Clear history when Firefox closes" > Settings
*https://support.mozilla.org/kb/Clear+Recent+History
Note that clearing "Site Preferences" clears all exceptions for cookies, images, pop-up windows, software installation, and passwords.
Clearing cookies will remove all specified (selected) cookies including cookies with an allow exception that you want to keep.
Let all cookies expire when you close Firefox.
*Firefox/Tools > Options > Privacy > Cookies: Keep until: I close Firefox
You can choose to keep third-party cookies from visited sites if necessary.
Create a cookie 'allow' exception for cookies that you want to keep.
*Firefox/Tools > Options > Privacy > Cookies: Exceptions

Why does Firefox have to make it so difficult to get answers--I am not going to be able to check the website to see what anyone might reply to my question on crashing?

I have no way of checking to see if anyone answers this. Why does Firefox have to make it so difficult?
What does this means: DLL C:\Program Files\Mozilla Firefox\MOZCRT19.dll is not a valid Windows image. Please check this against your installation diskette.
Suddenly all my tabs closed. Then Windows told me I had a gazillion infections. Then a tiny strip appeared saying it was Firefox and these little blocks started to fill up the little strip as if it were downloading something--there was no way to cancel this so I cut the power. Now when I try to use the Firefox icon, I get the message above.
Am I supposed to remove the old Firefox stuff and start from scratch? I am stuck using Internet Explorer.
I went to the Firefox website and tried to download it again, but McAffee jumped in and said there is something wrong with Firefox and I should register with them that I am downloading Firefox (I do not have McAffee). Then I got a security warning saying Firefox is not safe.
I am completely at a loss as to what to do next, since I don't understand any of this mumbojumbo.

Here's the story on one of your infections, namely JS:Redirector-EH[Trj]: http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan%3aJS%2fRedirector.H
The main problem with malware is that it uses the installation to proliferate by contacting hostile servers to download more of the same rogue code.
Firefox doesn't have the option to "Run" a file. You can only "Save File" or "Cancel". If you downloaded it with IE8, then yes, you can run it, but that's not what I wanted you to do.
What you should do now is to disable System Restore. You can open System Properties by hitting the Windows logo key and Pause/Break key together. Then click the "System Restore" tab. Then checkmark the box which says "''Turn off System Restore on all drives''". Reboot to clear its contents. System Restore unfortunately makes a backup of all executables which includes viruses so that when you reboot without deleting them first, System Restore reinstates them again.
After you complete that step, run Avast and Malwarebytes again to make sure the system is clean.
Then go to the Windows Update site (link on your start menu) and install the missing patches which enabled your machine to become infected in the first place.
Once the system is clean, repeat step one to download Firefox again, but please do not run the file. If you don't see the option to "Save File", cancel the download, but it should be there. You can use this direct download link to download FF4.0.1 [http://www.mozilla.com/products/download.html?product=firefox-4.0.1&os=win&lang=en-US Download Firefox 4.0.1]
Run the file after you download it to the desktop.

Why does FireFox change layout/settings during upgrades without asking ?

Just upgraded to Firefox 18 (windows 7 desktop). Why does Firefox change layouts/settings without asking the user if he wants it or not???
I am getting sick of those changes. I want to have at the google main page the options (as before) to search in all languages, or pages from a certain language or pages in a certain language (of course depening of the google address; f.i. at google.de for german languages, google.fr for french languages etc).
In the latest Firefox 17 it was working as I wanted and described before: when I visited www.google.de/firefox of www.google.fr/firefox. Now those 3 options (under the search bar) are gone and I do not want to operate by clicking on the advanced search button. Those things should be visible under the search bar again.
Also my STARTPAGE was GONE/DELETED after the update !!! Grrrrr.... Updating is OK but mozilla should not change user configured items !!!!!!!
The above described problem has nothing to do with the google website.

By the way, do Firefox and IE use the same proxy settings? You can view Firefox's here:
orange Firefox button (or Tools menu) > Options > Advanced > "Network" mini-tab > "Settings" button
The default is "Use system proxy settings".

Why does the Right-click - "t" delete a bookmark on the bookmark toolbar, when Right-click - "t" opens a new tab elsewhere. The bookmark toolbar use Right-click - "w" to open in a new tab. Please change this to "t" to...

Why does the Right-click -> "t" delete a bookmark on the bookmark toolbar, when Right-click -> "t" opens a new tab elsewhere in Firefox. The bookmark toolbar use Right-click -> "w" to open in a new tab. Please change this to "t" to... I keep deleting all my bookmark because you don't make the commands consistent!

If you have accidentally removed bookmarks then use "Organize > Undo" in the bookmarks manager (Bookmarks > Organize Bookmarks) to get them back. 
The Organize button is the first of the three buttons on the toolbar in the Library (Bookmarks Manager). 
That only works if you haven't closed Firefox.
[https://bugzilla.mozilla.org/show_bug.cgi?id=301888 Bug 301888] – Bookmarks cut instead of opened in new tab from Bookmarks Toolbar Folder
(please do not comment in bug reports; you can vote instead)

Why does Firefox constantly use 50-60% of my processes in Task Manager when I am not active on line?

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