Firefox stops loading websites (even after configuring about:config)

I have FireFox 8 installed, and it always stops loading websites. I've read this thread:
https://support.mozilla.com/en-US/questions/881844
And I followed the chosen solution by "archeocyathan" that is in this thread, and I went to about:config and changed the "max-connections" from 96 to 48.
When I change the "max-connections" - it works fine but only for a few minutes, and then the settings go back again to 96 and I have to change them again.
Questions:
1) Why is that?
2) Is there any way to FORCE about:config to stay with "max-connections" on 48 ? I looked online for ways to save it, but I understand once you make changes they are saved - so why it always changes back from 48 to 96?
3) Any way you can help out with it?
It's FireFox 8 as I mentioned, the latest version of FireFox ... I even uninstalled my Antivirus and nothing worked so far.

The current default of the network.http.max-connections pref in Firefox 8 on Windows should be 48
See:
*http://kb.mozillazine.org/Preferences_not_saved
*https://support.mozilla.com/kb/Preferences+are+not+saved
Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

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Firefox stops loading websites after a while

Unfortunately I can't narrow down the problem very much. Firefox just stops loading websites after a while without any obvious reasons - while Chrome or IE work, so it's not a connection problem AND I have it on at least 2 PCs. This is my environment:
Windows 7 x64 Ultimate and Pro, all important updates installed. Both PCs have 8-16 GB RAM, SSD - can't be a resource issue.
Actual version of Kaspersky Internet Security is used, Firefox is not blocked.
Firefox version 37.0.1
Some FF AddOns in use: AdBlock Edge, BetterPrivacy, ColorZilla, Firebug, Flashblock, Ghostery, Web Developer
I'm certain I don't have a virus and the issue is present on a brand new installed system as well. I don't use a proxy, DNS prefetching is disabled and IPv6, too.
It seems to happen more often when the PC hasn't been touched for 20 minutes or so (PC is not falling asleep) and after sleep modes, however it also happens just in the middle of working. I usually have 10-20 pages open (resource friendly ones usually) at once.
This also happens for websites that are already loaded. A click on reload also leads to a can't load website error.
I can't exactly say when this issue started, probably in the last 6 month with some FF update. Before it worked fine. This is becoming a real issue for me because FF becoming very unreliable.
Does anyone else experience this behaviour or has a fix for it?
NB: you may want to check the compatibility of your "None of these solve my problem" button. It might be a Chrome (41.0.2272.118m) issue but if someone's FF is not working and he's trying to find help using another browser...it might be a dead end (nothing happens on click).
Example: https://support.mozilla.org/en-US/questions/new/deskto/other?search=can%27t+load+websites+after+while#summarize-question

Does Firefox work normally again after exiting it and starting it backup again?
Several users reported with Firefox 36 that Firefox would eventually not be able to load more pages. One believed that Firefox was no longer sending DNS requests, which is a prerequisite to being able to connect to the web server. I don't recall that we identified the source of the problem, but in many cases, it was "something" in the settings folder.
Along those lines, could you conduct this test:
'''Create a new Firefox profile'''
''This is in addition to and does not replace your existing settings.''
A new profile will have your system-installed plugins (e.g., Flash) and extensions (e.g., security suite toolbars), but no themes, other extensions, or other customizations. It also should come with completely fresh settings databases and a fresh cache folder.
Exit Firefox and start up in the Profile Manager using Start > search box (or Run) -- type or paste the following and press Enter:
firefox.exe -P
''Don't delete anything here.''
Any time you want to switch profiles, exit Firefox and return to this dialog.
Click the Create Profile button, assign a name like April7, and ignore the option to change the folder location. Then start Firefox in the new profile you created.
It might take a while to determine whether the new profile is works better than your old one. If you want to import your bookmarks from your regular profile during that time, here's how:
You can use the Library dialog (Ctrl+Shift+b or "Show All Bookmarks") to access the Restore feature. The trick is knowing where to find your bookmark backups in your regular profile. After clicking Choose File... you can paste this into the file name space and press Enter to drill down to your profile folders:
%APPDATA%\Mozilla\Firefox\Profiles
The semi-randomly-named folder that has your last backup is usually the one ending with "default". Click into that one, then into the '''bookmarkbackups''' folder. Here you can pick the most recently updated file to restore.
Important: restoring a bookmark backup wipes any bookmarks currently in your active Firefox profile and replaces it with the contents of the backup file.
I think it's also reasonable to install AdBlock Plus and Web Developer, as those, by themselves, are unlikely to be the source of this seemingly rare problem. But I wouldn't add all your extensions at once to the new profile.

Firefox cannot load websites, but IE can, even after I tried all the ideas in the current articles on this topic as of March 10, 2011!

Firefox cannot load ANY websites, but IE can, even after I tried all the ideas in the current articles on this topic as of March 10, 2011!
One day it was fine, and the next day it stopped working! I have tried everything suggested under the topic "Firefox cannot load websites but other programs can."

You should e able to install FlashPlayer separately on IE and Firefox. So you may use Flash 11.3 on IE and 11.2 or 10.3 on Firefox.
Work from the administrator account. First of all sort out Firefox, use the Adobe uninstaller to uninstall Flash before reinstalling 11.2 Afterwards check that IE is ok, the Uninstaller may have changed that so you may need to reinstall Flash on IE.
* see instructions in [[flash 11.3 crashes]]
You are apparently using an outdated Firefox 8. That is not secure you should update to the latest Release Firefox 13 (or within a day or so Firefox 14)
You may also encounter problems relating to use of RealPlayer software and that software may affect use of FlashPlayer 11.3
* see also [[Fix problems with RealPlayer add-ons]]
* a user ''blacksabath710'' recently posted a workaround in [/questions/931055] suggesting use of free software from http://www.dvdvideosoft.com/
P.S.
When you finish set Firefox's FlashPlayer not to upgrade, and until this issue is resolved do not follow suggestions from Adobe, or Plugincheck etc. to upgrade Flash.
Use this test page form Adobe in each browser and account to check Flash is working ok
* http://helpx.adobe.com/flash-player/kb/find-version-flash-player.html
The test page will display version information and error messages or a Flash animation to prove flash is working.

Firefox will work fine, then for no reason stop loading websites.

I'll be having a great time on Firefox when out of nowhere it will stop loading websites - it won't give me an error message, it will just saying 'connecting' and spin forever. This can happen at any time and is beginning to get really frustrating - sometimes I will go an hour without it happening, sometimes 30 seconds. I'm currently typing this on Internet Explorer, whilst Firefox refuses to open a webpage in the background.
Whenever this happens, I'll have to exit Firefox. This would be fine, although reopening Firefox will then give me a 'Firefox is already running, but not responding' error, followed by the now classic 'Your Firefox profile cannot be loaded, it is missing or inaccessible.' Trying to close it with the Task Manager doesn't seem to work - even when using it with administrative privileges it will not disappear. Right-clicking and selecting 'go to Detail' and trying to close it from there just gives me an 'Access Denied' error. Earlier today, after restarting the computer, Firefox gave me this message before I had even opened it, yet other times it works fire and loads my profile perfectly.
Is there a way to deal with this problem? I've tried creating a new profile, I've tried refreshing Firefox and I've tried Uninstalling and Reinstalling. This happens with or without add-ons installed and is driving me crazy. I have used Firefox for years so have a large selection of bookmarks and passwords that I don't want to lose. Currently running this on a fairly up-to-date laptop with Windows 8 installed.

I was having this same exact problem for the last week. It started happening after Firefox updated. I tried a few different things that didn't help. I tried uninstalling and reinstalling which didn't help either. I finally fixed the problem tonight.
Here are the steps I took to fix it. Make sure you are logged into sync and hit the sync button to update it. This will save your bookmarks and user settings.
If you want to be able to restore your current session go into your main drive and click users, your user name, AppData, Roaming, Mozilla, Firefox, Profiles, open that folder and copy sessionstore-backups and save it to your desktop or somewhere you can remember.
After you have done that uninstall Firefox. Now restart your computer into Safe Mode.
Go into your main drive usually C on most computers and click users, your user name, AppData, Roaming. Click the Mozilla folder and delete it. Now hit the back button and click on Local. Find the Mozilla folder in there and delete it too.
You can now restart your computer and install a fresh copy of Firefox. Once it is installed you can log into sync and it will restore all your settings and bookmarks.
If you want to restore your previous session close Firefox and make your way back to AppData, Roaming, Mozilla, Firefox, Profiles, open the new profiles folder (Example: abcd1234.default) and paste the folder you saved called sessionstore-backups in there.
You can now open Firefox and all your tabs will be there, and after a few mins all your settings and bookmarks will be restored by sync. You shouldn't have any more problems following this method. The pages no longer stop loading and it closes like it is supposed to.

Firefox stops loading pages after trying to open a heavy page

firefox stops loading pages after trying to open a page with alot of pictures etc, with big size. it just keeps on loading pages with no result.
my internet is fairly low speed so i take my time but this happened each time i tried to open such sites.
even when i close that '''tab''' and try to open just '''google.com''' , it wont load.
its solved after closing and opening firefox again . but happens again if i try to open the same heavy site

Which security software (firewall, anti-virus) do you have?
A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
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.

Firefox cannot load websites, but other programs can. Listed guide/faq not effective.

I went through the FAQ guide for firefox not loading webpages, but after having changed both boolean setting in the about:config section of the firefox advanced settings, deleting and re-adding it to the program permissions list in my firewall (mcafee antivirus 2011), and even attempting to completely disable the firewall for a period of time, I am still unable to browse the internet on firefox. Internet explorer, however, does work.

Have you already seen [[firefox cannot load websites but other programs can]]
*What exactly happens, or does not happen and do you get any error messages ?
*Is it all websites you have a problem with, or only some ?
* What happens if you work offline, can you load web pages that are saved on your own computer ? (save something with IE, -as HTML web page files - maybe this page, then try opening it with both Firefox and IE)
Can you use firefox to look at your local disk such as (depending on your setup) ''file:///C:/''
Try checking security settings, and security logs, is firefox being blocked ?

Firefox cannot load websites(facebook) but other programs can

after i have upgrade firefox cannot load websites(facebook) but other programs can, i cannot see my friend whose is online,and cannot chat with them, cannot share video ....what should i do?

A good place to ask advice about web development is at the mozillaZine Web Development/Standards Evangelism forum. 
The helpers at that forum are more knowledgeable about web development issues. 
You need to register at the mozillaZine forum site in order to post at that forum. 
See http://forums.mozillazine.org/viewforum.php?f=25

Firefox cannot load websites but other programs can

Firefox cannot load any webpages, but IE can.
I have tried everything suggested. This problem happened befoer I updated Firefox and did not resolve after I updated firefox.
I tried changing internet settings, disabling firewall, and even disabling IVP6, but nothing is working.

Have you already seen [[firefox cannot load websites but other programs can]]
*What exactly happens, or does not happen and do you get any error messages ?
*Is it all websites you have a problem with, or only some ?
* What happens if you work offline, can you load web pages that are saved on your own computer ? (save something with IE, -as HTML web page files - maybe this page, then try opening it with both Firefox and IE)
Can you use firefox to look at your local disk such as (depending on your setup) ''file:///C:/''
Try checking security settings, and security logs, is firefox being blocked ?

I have a macbook with Iphoto 8.1.2. How do I get it to stop importing duplicates even after I checkbox tell it not to.

I have a macbook with Iphoto 8.1.2. How do I get it to stop importing duplicates even after I checkbox tell it not to.

How do I get it to stop importing duplicates even after I checkbox tell it not to.
That checkmark will only prevent iPhoto from importing exact duplicates - the exact filename, image format, exactly the same size,
What kind of duplicates are you asking about? Have the files been renamed or converted in any way?

All website went "Not Found HTTP Error 404. The requested resource is not found." and the "Firefox cannot load websites but other programs can" page is not help

''dupe of https://support.mozilla.org/en-US/questions/928117''
all website went "Not Found HTTP Error 404. The requested resource is not found." and the "Firefox cannot load websites but other programs can" page is not helping in any ways

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
*http://kb.mozillazine.org/Error_loading_websites
You can try to reset (power off/on) the router.

Why my firefox stopped loading when I want to open a new tab? this will continue if I do not move the mouse. this also happen when I download.

why my firefox stopped loading when I want to open a new tab? this will continue if I do not move the mouse. this is also happen when I download. if I does not move the mouse, the download process stops or stagnant ormanaged to download but not full

hey, just to keep you updated - there is now a fix available for firefox 25, which should address the particular problem of pages not loading unless the mouse is moved.
if you have downgraded to firefox 24 to work around the issue, please go to ''firefox > options > advanced > update'' and turn automatic updates back on. then go to ''firefox > help > about firefox'' which should trigger the update to firefox 25.0.1.
 in case you need to download the setup file for firefox 25.0.1 separately you can do so from https://www.mozilla.org/firefox/channel/#firefox

Firefox cannot load websites but other browser can

background - family community home pc...mozilla worked great for the longest time (along side IE)...all of a sudden mozilla can't connect to any website...IE always can (yuk)
troublshooting steps (still can't connect to web w/firefox):
1. Removed Mozilla, re-installed, same results
2. Searched for all mozilla folders. Deleted two folders and also daughter's mozilla iphone folder. Removed Mozilla, re-installed, set connection to "no proxy", same results.
3. Ran "House Call" - no malware found.
Help! do not like IE!

Have you already seen [[firefox cannot load websites but other programs can]]
*What exactly happens, or does not happen and do you get any error messages ?
*Is it all websites you have a problem with, or only some ?
* What happens if you work offline, can you load web pages that are saved on your own computer ? (save something with IE, -as HTML web page files - maybe this page, then try opening it with both Firefox and IE)
Can you use firefox to look at your local disk such as (depending on your setup) ''file:///C:/''
Try checking security settings, and security logs, is firefox being blocked ?

Spotlight stopped finding files, even after "index". They're visible files, not system files (like.jpg, .xls, .doc). This happened for no apperent reason.

Spotlight stopped finding files, even after "index". They're visible files, not system files (like.jpg, .xls, .doc). This happened for no apparent reason.
Worked well with Yosemite the first week, but now it doesn't.

Any advice would be helpful. Thanks

Firefox stops loading files halfway through - i.e. has same settings (except allow for session) and works fine

Firefox stops loading files halfway through - Internet explorer has same settings (except allow for session), is less secure and works fine.

Do you have that problem when running in the Firefox SafeMode? 
[http://support.mozilla.com/en-US/kb/Safe+Mode] 
''Don't select anything right now, just use "Continue in SafeMode."''
If not, see this: 
[http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes]

I have firefox 7.0 and i go to about:config and change the URL default from bing to google but when i close firefox an open it back up it changes back to bing why is this?

I have firefox 7.0 and i go to about:config and change the URL default from bing to google but when i close firefox an open it back up it changes back to bing why is this? I stand by google 100% and if ur gonna make it where i can't use google as the URL's seach engine then i will uninstall it.

The default of the pref network.http.max-connections has been increased from 30 to 256 in Firefox 6+ versions.
Try to decrease the value of the pref network.http.max-connections from 256 to 30 as used in Firefox 3 versions.
*https://support.mozilla.com/kb/Firefox+never+finishes+loading+certain+websites
Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

Firefox stops loading websites (even after configuring about:config)

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