After updating Firefox to version 26.0, when opening I cant access any webpages. I done resets and done the uninstall and upon reinstall I get the same problem

The webpages tell me to change the proxy which I did and then to check for the firewall which I also did. I thought maybe the add ons where the issue so I attempted to do a safe mode without them on as well but to no avail. I am at a loss. I have uninstalled and re installed firefox 3 times now and nothing has worked.

Search for prior edition online it should be there 26 is buggy

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After updating Firefox to version 16.0.1, it no longer works in conjunction with "Proxifier"...

Hi,
I'm using Firefox on Windows XP professional x64 SP2.
I also use a program called "Proxifier" which directs all traffic from my computer to the Internet and vice versa through a proxy server and does the name resolution through proxy DNS not system DNS. Before updating my Firefox to v. 16.0.1, everything was working fine: Firefox connections were made through "Proxifier" and all the connections made by Firefox were shown in Proxifier's window.
But after updating Firefox, traffic from Firefox does not pass through Proxifier and in other words Firefox opens websites if I disable Proxifier. THIS IS NOT THE CASE WITH Internet Explorer which works fine and its traffic is directed through Proxifier as usual.
I did an extensive search through Google for a solution, and most relevant results suggest that it may have something to do with messed up LSP_CATEGORIES:
link: https://bugzilla.mozilla.org/show_bug.cgi?id=621320
and https://bugzilla.mozilla.org/show_bug.cgi?id=636088
Anyway, I tried uninstalling and reinstalling Firefox and Proxifier, resetting Firefox, resetting winsocks catalog (netsh int ip reset - netsh winsock reset) several times and tried the relevant suggestions in this link: https://support.mozilla.org/en-US/kb/fix-problems-connecting-websites-after-updating?esab=a&as=aaq
Also tried installing previous versions of Firefox such as v. 13 or 3.6.28 but the problem exists with these versions as well.
Unfortunately nothing has worked so far. I'm really puzzled since Internet Explorer is working fine with Proxifier and this problem with Firefox appeared only after updating it.
Can anyone suggest a solution?
Regards

hello, you probably have to set-up firefox to use a proxy to connect to the web: https://support.mozilla.org/en-US/kb/settings-network-updates-and-encryption#w_network-tab

After updating Firefox to version 12.0, I can no longer get my web-based help desk software to follow hyperlinks.

Our help-desk is internal, secure website. We have used Firefox for our help desk software browser since we purchased the software. But after updating to version 12, clicking on a hyperlink no longer works but only for the help desk software. Pre-version 12 works fine. External sites are fine. IE executes the help-desk software fine. There is no error, it just never executes the hyperlink. It's like they're text. Where can I start looking? We'd prefer not to go to IE, but we are using it now to get by.

Try to disable hardware acceleration in Firefox.
*Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
*https://hacks.mozilla.org/2010/09/hardware-acceleration/
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

After updating Firefox to 10.0.2, when I click on a link in an email, I get an error box saying "There was a problem sending a command to the program".

I have not changed/updated my mail client, Windows Live Mail, so I assume the problem is with the updated Firefox.

Try:
*http://kb.mozillazine.org/Windows_error_opening_Internet_shortcut_or_local_HTML_file_-_Firefox

I cannot delete cookies after updating to 9.0.1, also when opened, I have 2 new cookie files that disappear when FF is closed.

I have uninstalled/reinstalled 9.0.1, the same thing happens. Checked my Profile, cookies.sqlite is there when FF is closed or uninstalled. When installed and opened, I have 2 new files, cookies.sqlite-wal and cookies.sqlite-shm, along with cookies.sqlite. Is this the reason I can't delete cookies? Also I have, and have had enabled AdBlock Plus and Privacy Browsing. After updating, I can't post anything to FF Support (this is my 4th attempt, finally used Safari to post) and files under Tools, such as Clear History are accessible, I shouldn't have a History to delete.
(1st edit)
OK. I reinstalled FF 9.0.1 from Safari, but not directly from Mozilla. I used CNet, now things are working like they should. I have no cookies listed, except the ones I want. Private Browsing is working properly. However, I still have those 2 extra cookie files; -wal and -shm.
(2nd edit)
I spoke too soon. After accessing sites that I frequent, the 'ad' cookies are back (adbright, realmedia, 247realmedia) and the site cookies are eliminated, not there, gone. Now I can't login to anything and am back to Safari to access FF Support Forum. Do I have a bug? Someone please help, I'm desperate, I hate IE, Safari, Chrome, etc. They have neither the level of ad and pop-up elimination that Firefox has; nor, do they have the level of customization that Firefox has. The 2 extra cookie files, -wal and -shm, are still there when FF is open, and gone again when FF is closed. One more thing I noticed, I have a Chrome Support Application file in my Library. Could the Chrome cookie file interfere with FF cookies? I wouldn't think so, I have Safari, as well, and neither browser has ever interfaced with the other before.
(3rd edit)
I have uninstalled/reinstalled FF, all of my add-ons and also tried deleting the cookies.sqlite document from the FF Profile file, to no avail. I have counted, there are 14 sites listed in the Preferences>Privacy>Show Cookies pane (no pun intended) and they are all "ad" sites. These sites are also listed as blocked sites in Adblock Plus. Until someone answers, I give up, I don't know what else to do. There was only the one time that the cookies were gone from the Show Cookies pane, every other time I uninstalled/reinstalled anything, they were still there. So, until someone helps me, I'm stuck. The only thing I have not done is deleted the Profile file altogether. That is the last thing I want to do, unless I can save my bookmarks somewhere to move back after reinstallation. If this isn't rectified within a few days, I may just try that, too.

Do you have an extension like TACO (Abine) or TrackerBlock that maintains a set of OPT-OUT cookies?
* Targeted Advertising Cookie Opt-Out (TACO): https://addons.mozilla.org/firefox/addon/targeted-advertising-cookie-op/
* TrackerBlock: https://addons.mozilla.org/firefox/addon/trackerblock/
* Beef Taco (Targeted Advertising Cookie Opt-Out): https://addons.mozilla.org/firefox/addon/beef-taco-targeted-advertising/
If you do then you need to disable or uninstall such an extension.
If clearing the cookies doesn't help then it is possible that the file cookies.sqlite that stores the cookies is corrupted. 
Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete other present cookie files like cookies.sqlite-journal in the Firefox Profile Folder in case the file cookies.sqlite got corrupted.
*http://kb.mozillazine.org/Cookies

After updating Firefox to version 10.01 i no longer have any addons listed under extensions tab. I do have addons installed and they are working.

Example addons that are currently working include no-script and downloadthemall. Both addons are working but do not show up under extensions. I can only see my plugins, such as java, realplayer, shockwave etc. It's very annoying when trying to acess my addons to constantly be taken to the "Get Addons" page.

It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.org/kb/Unable+to+install+add-ons
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is a compatibility update available.
See also:
*http://kb.mozillazine.org/Preferences_not_saved
*https://support.mozilla.org/kb/Preferences+are+not+saved

I updated firefox to version 8. When I click on the shortcut to open the browser nothing happens. It doesn't open. I checked the process in my task manager and it says it is running. Any idea what's up?

Running Windows Vista 32 bit

I just clicked up there on "I have this problem too" and then began tinkering with Windows. What I've found out: if I go to firefox.exe properties and run as administrator, it works -- Firefox opens. The only hitch is that for every instance of FF I open, I get that annoying box asking me if I will allow FF to make changes to my computer, as if it were a new install. I also lose the capacity to open instances in tabs... This is not a workable solution to the problem, but perhaps it will provide someone with useful insight to help fix this issue.
BTW, I run Windows 7 Ultimate 64-bits.
After an hour or so of research, I've found a runaround for the UAC issue (basically changing permissions specifically for Firefox, without changing my global settings), and now I have a nice Firefox icon on my desktop, with no irritating boxes popping up every time I click on it. And Firefox works! Here's the runaround:
http://www.sevenforums.com/tutorials/11949-elevated-program-shortcut-without-uac-prompt-create.html
Hope this helps.

After updating Firefox sites are only displayed in text. How can this be solved OR changed back to the old version?

Startpage is normal but after connecting further only text is displayed

I also forgot to note that this problem also persists with the new iBooks application. I cannot get past the 'Get Started' screen or access the iBooks Store. Again, all top bar menus are unresponsive.
DT

Since updating Firefox, just about every window I open uses a script font that is very small and unreadable -- why, and how can I get it to use normal fonts?

I never had this issue before the last update I made. The font is a font on my computer and I thought that maybe it was the font and if I disabled it, the problem would go away. But sadly, it just picks another fancy script installed on my computer. It doesn't matter how many I disable, Firefox continually picks another fancy script to replace the ones I've disabled. What's odd is that some windows I open are almost entirely the fancy script and others may only have one line or a heading in the script. This is not an issue at all on Safari and was never a problem on Firefox until the next to last update I made.

You can do a check for corrupted and duplicate fonts and other font issues:
*http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts
*http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html
You can do a font test to see if you can identify corrupted font(s).
*http://browserspy.dk/fonts-flash.php?detail=1
You can also try different default fonts.
* Firefox > Preferences > Content : Fonts & Colors > Advanced
*[ ] "Allow pages to choose their own fonts, instead of my selections above"

After installing updated firefox,my speed dial will not open when I close the current tab which it did before I upgraded

after installing updated firefox,my speed dial will not open when I close the current tab which it did before I upgraded. How do I fix this problem? Thank You, Mike Chidester

is it up to date
Speed Dial :: Add-ons for Firefox
"Works with:
Mobile 0.7 - 1.0.*
SeaMonkey 2.0 - 2.5a1
Firefox 2.0 - 8.0a1"
https://addons.mozilla.org/firefox/addon/speed-dial/#detail-relnotes

My customized Yahoo Toolbar (v. 2.3.5.20110120033202) would not load properly after I installed the new Firefox 5.0, even though when it checked for incompatibilities while installing it made no mention of the Yahoo toolbar, only the Google toolbar

My elongated (statement) question fully explains the problem I am inquiring about. Only some rudimentary features of my existing Yahoo toolbar were displayed and it was missing all of my previously selected icons which are on file with Yahoo, not my computer. You also could not right or left click for a menu on the options icon (gear icon) to the right of the search window.
It would seem that there are incompatibility issues between the new 5.0 Firefox and the existing most current version of the Yahoo Toolbar add-on. I don't know know why this wasn't detected in the installation scan for compatibility of installed add-ons.
I have re-installed the 4.0 Firefox for the time being in order to regain the use of the Yahoo toolbar and all it's features which I use regularly.
Does anyone have any other suggestions as to what the problem may be?

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

Problem after updating to latest version 10.0.1

After updating to latest version 10.0.1, every time Firefox starts it checks for add-ons compatibility before opening, this is very irritating. How can I stop this?

See:
*http://kb.mozillazine.org/Preferences_not_saved
*https://support.mozilla.org/kb/Preferences+are+not+saved
It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.org/kb/Unable+to+install+add-ons
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is a compatibility update available.

After updating to Firefox5.1, Nvidia kernal mode driver frequently "not responding & crashed then recovered", along with crashing of the Firefox browser.

After updating to Firefox5.1, Nvidia kernal mode driver frequently "not responding & crashed then recovered", along with crashing of the Firefox browser.

I have the same problem. I just upgraded to Win 7, no problems. Then I upgraded to FF 4.0, and I kept getting Nvidia Video Card crashes. I always undo my last computer change/install when something like this happens, so I immediately uninstalled 4.0, and went back to my older version of Firefox. No problems ever since.

Am I the only one getting calls from 253-802-0308 about malicious file downloads after updating FIREFOX?

After updating Firefox I start getting calls from 253-802-0308 (International Telcom in Auburn Washington, found using 411.com). The report that they are getting messages that my Windows PC is reporting the downloading of malicious files. I don't think that there is a connection with Mozilla but it only started after I ran the last 2 or 3 updates to Firefox. Searches on Google and other search engines don't show logical connections to the phone calls and the problem being reported to me. None of my anti-virus programs, Ccleaner, DEFENDER & AVG pickup and malicious files. I'm curious about who they may be because when I question them during the calls they end up hanging up on me. Just wondering if similar problems are being reported.

That is a reported scammer set-up. Read some of the following from actual phone customers. It is not related to your Firefox updates. I have gotten a few of these types of calls on my '''''unlisted '''''home phone number over the past several years. They use a dialer, usually automatic and sequential number dialing. Get a loud whistle to blow into the phone mouth piece or one of those loud air horns from the hardware/sporting good store; this kind of trash deserves broken ear drums.
*https://encrypted.google.com/search?q=253-802-0308&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''
Not related to your question, but...
You need to update some plug-ins:
*Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
*Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]

After updating Firefox I am getting this message any time I do anything "Exc in ev handl:Error: Bad NPObject as private data"

This error happens each time I use Mozilla. especially when I click on an extension or try to work in any of my e-mail accounts (Yahoo, Gmail, or RCN). Sometimes I am able to continue by just clicking OK and other times it prevents me from completing my task. This started happening right after I downloaded and installed your latest version of Firefox. I see others are having the same problem. Error message is "Exc in ev handl:Error: Bad NPObject as private data"

That issue can be caused by the McAfee Site Advisor extension
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
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

After updating Firefox to version 26.0, when opening I cant access any webpages. I done resets and done the uninstall and upon reinstall I get the same problem

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