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Firefox only shows a page that says XML Parsing Error: undefined entity Location: chrome: //browser/content/browser.xul. So I can't use any fix that uses ffox

After I first got the message I uninstalled Ffox and reinstalled it. Same message. So I can't get to any ffox menu, or buttons because I only have the one page with the… (read more)

After I first got the message I uninstalled Ffox and reinstalled it. Same message. So I can't get to any ffox menu, or buttons because I only have the one page with the message.

One suggestion was to uninstall and delete "firefox program file" but I can't find any file with that name on the C drive Mozilla Firefox folders

What can I do?

Asked by Foxflight24 2 years ago

Last reply by LJones 1 year ago

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Why won't Adobe Flash Player work on Firefox?

upgraded to version 18.0.2 Firefox started getting flash player fail message tried installing flashplayer11x32_mssd_aih.exe install windows just closes and still no flash… (read more)

upgraded to version 18.0.2 Firefox started getting flash player fail message tried installing flashplayer11x32_mssd_aih.exe install windows just closes and still no flash in firefox

Asked by Update_Fail 8 years ago

Last reply by ValorianPrime 8 years ago

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How do I install Firefox 64-bit? Firefox automatically installs 32-bit on my computer and it's not working.

Ever since February (some kind of update happened), Firefox has basically died on my computer. I open it and only for a few moments does it work with any kind of speed, … (read more)

Ever since February (some kind of update happened), Firefox has basically died on my computer. I open it and only for a few moments does it work with any kind of speed, then it literally dies to a snails pace. It takes minutes even to scroll a screen or open a menu screen. And that's just being on the Mozilla site. Forget about trying to open any other significant websites. I have tried everything from reinstalling, resetting and disability plug-ins. I will say that the Firefox Icon at the bottom of my screen shows a security shield on it, which didn't use to be there. I really need help. I've been forced to use Chrome, which did work fine, but I can't stand it. SAVE ME PLEASE!!!!

Asked by Drkstr 8 years ago

Answered by Drkstr 8 years ago

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'do this automatically for files like this from now on' box greyed out

Whenever I go to download a file, the 'do this automatically for files like this from now on' box is greyed out. I have scoured the internet looking for a solution and ju… (read more)

Whenever I go to download a file, the 'do this automatically for files like this from now on' box is greyed out. I have scoured the internet looking for a solution and just about every one of them is either severely outdated or does not fix my problem. I have reset my Firefox more than I can count and yet it does not seem to fix my problem. It used to work just fine, but it no longer does and it is very annoying and frustrating. I have even tried to completely uninstall it and reinstall it to my computer and that doesn't fix anything.

Is there any sort of way to fix this problem? Firefox is my browser of choice and I'd prefer not to have to start using another one. I know it may seem trivial because it's just one extra step, but when you're doing it a bunch of times in a row like I do, it can get quite bothersome.

Thank you.

Asked by jenz1205 8 years ago

Answered by Gingerbread Man 8 years ago

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Computer is telling me that I do not have full permission to install Firefox. Why is this window popping up?

I have seen this question already posed in the forums about updating the latest version of Firefox, however I am not trying to update the version, I am trying to download… (read more)

I have seen this question already posed in the forums about updating the latest version of Firefox, however I am not trying to update the version, I am trying to download the latest version of Firefox to Windows through Chrome. I click the download button on the Mozilla website and I extract the file. At this point the computer asks me if I want to save the file or run the file. I have tried to just run the file and the computer shoots out this message "You may not have the necessary permissions to use all the features of the program you are about to run. You may run this program as a different user or continue to run the program as the currant user". The window gives me two options, "Run as currant user" (which closes everything when I choose it), and "Run as administrator" (which leaves me with a user name and password which are always wrong). I can't download Firefox and have tried alot of stuff. I feel like it is a security setting in my computer that needs to be adjusted but I don't know enough to start randomly tinkering around.

As in all Forums... PLEASE HELP!!!!!!!!

Asked by Eben-ezer 7 years ago

Answered by cor-el 7 years ago

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I am unable to (effectively?) install extensions. I have tried online suggestions without success.

Firefox was creeping after I had disabled all addons. So I tried Refresh, having been assuered that a number of files, including Bookmarks, would be preserved. I have… (read more)

Firefox was creeping after I had disabled all addons. So I tried Refresh, having been assuered that a number of files, including Bookmarks, would be preserved. I have spent at least an hour trying to re-install some extensions. I have tried online suggestions without success. I have made four attempts to install Classic theme restorer. I have gotten one pannel which suggests that it is installed. but I it does not appear to be operative. I still see the new GUI. This is a substantial handicap, as I am not very familiar with the new GUI.

As far as I can tell, two other extenmsions have not been installed. And I have not been able to recover my bookmarks. Numerous other changes have occurred, including an invasion of Yahoo and Google products. I seem to have a number of plugins installed which I have neither re-installed nor re-acitvated

I am running Windows 7, with Firefox 45

Asked by cbrookej 5 years ago

Answered by FredMcD 5 years ago

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Error code 0xc0000142 unable to start, unable to reinstall, why?

I couldn't connect to the internet. Received an error code 0xc0000142 "The application was unable to start correctly." After several tries I shut the computer down and … (read more)

I couldn't connect to the internet. Received an error code 0xc0000142 "The application was unable to start correctly." After several tries I shut the computer down and rebooted. Same response. Firefox had been working fine earlier. Internet Explorer was working so I uninstalled Firefox and reinstalled. When installation reached about 75% completion the same error code window popped up. My only options were "search for a fix" or "close program". I clicked "close the program" and installation resumed and appeared to be complete, but it's not working. Tried this several times. Once when the window popped up I had the option of seeing the details. They read: "App crash Maintenanceservice.exe version 49.0.0.6103 time stamp 57dc3758. I installed the Revo Uninstaller. I used that tool to uninstall Firefox and then reinstalled. No go. Security Essentionals updated & scanned. Firewall is set to allow Firefox to penetrate. Malwarebytes scan found nothing malicious. I installed MS Safety Scanner and it found nothing. I've had problems with Adobe Flashplayer in the past so I uninstalled that. Ditto for Javascript so I disabled it. Any suggestions?

Asked by LindaK71 5 years ago

Last reply by guigs 5 years ago

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How do I stop firefox from updating, even when I marked it not to?

I have to use version 51 so that I can use Java to open Oracle (I refuse to use IE). I have checked the box to never check for updates, Mozilla updated anyway. I deleted… (read more)

I have to use version 51 so that I can use Java to open Oracle (I refuse to use IE). I have checked the box to never check for updates, Mozilla updated anyway. I deleted everything I could find on my computer Mozilla related, re-installed version 51, checked the box to not update and checked daily to make sure that there were no pending updates. I ran it for about a week just fine, but then it crashed and when it restarted, it was on version 53. I deleted everything Mozilla again, re-installed v51, told it not to install the sneaky background service, checked the never update box, went into the about:config and made sure the setting really said not to update, then went into the prefs.js file to triple check that it really really wouldn't be set to sneak in an update, and then went and double checked that the sneaky background service wasn't installed, then made sure it didn't have any pending updates anywhere. Ran it fine for a day, it crashed, and when I restarted it, surprise, surprise I'm on v54. It shouldn't be this hard to just stay on the version I want to use. What in God's name do I have to do to keep it from updating? Does Mozilla just ignore what the user actually tells it to do and does what it wants anyway or is my version of Mozilla just trying to start the Skynet revolution? I'm pretty close to just writing a vb script to just delete everything Mozilla off my computer and re-install v51 it everyday at midnight so I can just not have to deal with it anymore, but I figured I'd ask for help here first. If I can't get help here, I'll probably just go under my desk and cry while eating glue and rocking back and forth until they either fire me or have me committed.

Asked by Glebin47 4 years ago

Answered by John99 4 years ago

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Why break critical extensions?

Dear Mozilla: you have to realize that making the browser faster is worthless if you break extensions like TabMixPlus which provide critical *usability* features! Usabili… (read more)

Dear Mozilla: you have to realize that making the browser faster is worthless if you break extensions like TabMixPlus which provide critical *usability* features! Usability is always more important than performance. It's essentially a completely different browser without TabMixPlus. I might as well use Chrome. For example, I don't see how anyone can manage having tabs that scroll on one line. Instead of being excited about getting a performance boost, I'm now sad that I may one day have to give up how I've been interacting with a browser for 10+ years.

What you should have done is work with the developers of the most popular extensions to help them upgrade *before* releasing backwards-incompatible changes to Firefox. Or else roll in some of the critical features to Firefox itself.

I've downgraded to 56.0.2, we'll see how long I can keep that going.

Asked by gtrichar 3 years ago

Last reply by jscher2000 3 years ago

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No success with firewall exceptions so how do I allow download link from unknown publisher

Trying to allow a manufacturers' system scan after suffering longstanding desktop issues but before this can happen I have to download their support assist launcher. So… (read more)

Trying to allow a manufacturers' system scan after suffering longstanding desktop issues but before this can happen I have to download their support assist launcher. So the problem is, the download is blocked after the run/save window with another saying unknown publisher and so refuses to start downloading. The manufacturer says check internet connection. It's fine Now I've allowed the name of the support launcher in firewall via exceptions but it still won't load. Even tried it with firewall turned off. The download Icon TzsetupSfx, is shown in the downloads folder along with its file version 1.2.0.715 and name of publisher. So what can I do to get the download accepted by Firefox. I'm running 52.7 in win XP 3 pro. The manufacturers' URL is a www.

Asked by donedo 3 years ago

Answered by donedo 3 years ago

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How do I install a new version of FF, but keep my older version completely intact. I need a very simple method please !

Can anyone give me a VERY simple method of installing a new version of FF, whilst leaving my older version totally intact. I am so surprised that Mozilla have not yet bui… (read more)

Can anyone give me a VERY simple method of installing a new version of FF, whilst leaving my older version totally intact.

I am so surprised that Mozilla have not yet built this option into their download options .

I need my addons to work as they are essential for my visual problems.

Asked by Firebird007 3 years ago

Last reply by jscher2000 3 years ago

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Firefox has stopped working immediately upon attempted launch. Reinstall does not work. Shift does not work. firefox -P does not work. Change: HW acc turned on.

Firefox was working ,but no 3-D. Turned on 3-D. Attempted to restart firefox. Now attempting to start firefox and it immediate says "Firefox has stopped working". Running… (read more)

Firefox was working ,but no 3-D. Turned on 3-D. Attempted to restart firefox. Now attempting to start firefox and it immediate says "Firefox has stopped working". Running firefox -P does the same. Re-install does the same. Exception Code: c0000005

Asked by Jim 1 year ago

Last reply by Jim 1 year ago

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Did Firefox 73.0 stop downlaod "ask me" for file location option?

I have seen that 73.0 has caused some major problems for some. Since I installed 73.0 (64-bit) however, I have only one problem but it has a high impact on my use of Fire… (read more)

I have seen that 73.0 has caused some major problems for some. Since I installed 73.0 (64-bit) however, I have only one problem but it has a high impact on my use of Firefox. The setting for downloads was not changed and remained set correctly for "Ask me for file location" which has worked daily previously on previous Firefox versions. I have tried to change the setting to a specific file location and then change back to no avail. The specific location works fine but returning to the "ask me" option does not change anything. Not sure what to try or do to proceed...

Asked by RonK 1 year ago

Answered by RonK 1 year ago

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FF 74 lost my bookmarks toolbar, they are vertical on the left, at the top if shiftkey and start FF

The update today to 74 lost all my customized, userchrome.css stuff and the row of bookmarks that used to be at the top now go down the left size, or right side if I want… (read more)

The update today to 74 lost all my customized, userchrome.css stuff and the row of bookmarks that used to be at the top now go down the left size, or right side if I want, but I want it at the top. Userchrome does not seem to recognized either as I put what I had kept, back in the a chrome folder in the profile folder.

Asked by carversmith 1 year ago

Answered by jscher2000 1 year ago

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lost bookmarks etc after updating firefox

i have lost everything and struggling to get all my bookmarks back after a update from firefox- HELP! Is there a number where someone can talk me through this as I cant s… (read more)

i have lost everything and struggling to get all my bookmarks back after a update from firefox- HELP! Is there a number where someone can talk me through this as I cant seem to sort it from the support pages

Asked by pantelisgeorgiou 11 months ago

Answered by FredMcD 11 months ago

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Solaris: ld.so.1: firefox: fatal: libc.so.1: open failed: No such file or directory, Couldn't load XPCOM

I installed Firefox 18.0.1 on a Sparc 10 Ultra running Solaris 10, bash shell. There were no installation errors, but when I try to run firefox, I get: XPCOMGlueLoad err… (read more)

I installed Firefox 18.0.1 on a Sparc 10 Ultra running Solaris 10, bash shell. There were no installation errors, but when I try to run firefox, I get:

XPCOMGlueLoad error for file /opt/sfw/fiewfox/libxpcom.so: ld.so.1: firefox: fatal: libc.so.1: open failed: No such file or directory Couldn't load XPCOM

Any help would be appreciated.

Asked by Michele31415 8 years ago

Last reply by Michele31415 8 years ago

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I am having a problem with the upgraded version of firefox

Today I got a notice to upgrade Firefox. I downloaded it but It is not compatible with Symantec Endpoint Protection, which I have to keep on my computer. So I had to uni… (read more)

Today I got a notice to upgrade Firefox. I downloaded it but It is not compatible with Symantec Endpoint Protection, which I have to keep on my computer. So I had to uninstall the ungraded version of FireFox. Now I am stuck without Fireforx. How do I get the old version back?

Asked by Parien 8 years ago

Answered by user633449 8 years ago

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How To Make mozilla.cfg, override.ini, all-companyname.js, Files To Work Once And For All For All Users

I'm currently trying to apply a fix to the firefox browser (version 23.0.1) on over 250 computers. Setting default webpages, disabling annoying prompts like the default … (read more)

I'm currently trying to apply a fix to the firefox browser (version 23.0.1) on over 250 computers. Setting default webpages, disabling annoying prompts like the default browser and importing bookmarks, and erasing the history on shutdown, or startup. This is very easily done modifying the pref.js file, but I will not edit that file, it's out of the question. Another FF update will erase or overwrite all of my modifications.

I run a computer lab in the university that is locked down using a Net Support School console. You don't need to look that up. Basically all websites are restricted except the ones the ones I whitelist. The websites we use have extensive API's for JS, CSS, Java, PHP, etc... We utilize technology in order for students to use graphing calculators, video's, and taking module test from these white-listed websites, like Pearson, or Aleks. Now with that said, cookies, and stored profile history become a problem, and on some day's up to 25% of the students using the computers need their entire history deleted in order for a page to load. I think I fixed this problem permanently by whitelisting backend sites importing plugins, and API's etc, that I found from the developers console. Whatever. What I've learned from all of this is that Firefox can be very customizable utilizing the "...\Mozilla Firefox\mozilla.cfg" and the "...\Mozilla Firefox\defaults\prefs\all-companyname.js" (or custom.js) The problem, is no matter what I try I can't get these to work. The closest I got was here:

http://www.intrntpirate.com/?p=615

Again, even that ^^ didn't work. I followed these directions to a "T". What is wrong with the above information provided in the link? Why is firefox making harder and harder for us to optimize it for massive deployments across a corporation and a university? I'm not going to do any fancy hacks to avoid the main issue. I need mozilla.cfg, and the all-companyname.js, and the override.ini files to work, if and only if they are still relevant.

These are what my files look like so far:

name: all-lmc.js
location: C:\Program Files (x86)\Mozilla Firefox\defaults\pref\
pref("general.config.filename", "mozilla.cfg");
pref("browser.startup.homepage", "https://(some url)");

name: override.ini
location: C:\Program Files (x86)\Mozilla Firefox\
[XRE]
EnableProfileMigrator=false

name: mozilla.cfg
location: C:\Program Files (x86)\Mozilla Firefox\
//
lockPref("privacy.sanitize.sanitizeOnShutdown", true);
lockPref("privacy.sanitize.promptOnSanitize", false);
lockPref("browser.shell.checkDefaultBrowser", false);
lockPref("toolkit.telemetry.enabled", false);
lockPref("toolkit.telemetry.prompted", 2);
lockPref("toolkit.telemetry.rejected", true);

I've tried using, and not using, the automatic mozilla configurator. I've tried changing lockPref to pref. Nothing works. Not the override.ini, not the all-lmc.js, and not the mozilla.cfg. I've wasted hours reading through blogs of experts telling us to modify files that don't exist, or beating around the bush. I'm done researching. If you have the answer or want to help me figure this out just remember to keep it simple. Please. I ultimately want to package all the config files, with a how to, in a zip folder onto our shared drive. To have FF customized and ready to deploy to different departments across campus.

Asked by Kerberos 8 years ago

Answered by cor-el 8 years ago

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Firefox will not open .aspx files. I can open them with IE. What's up?

I updated Java, uninstalled and then re-installed Firefox. It will not open .aspx files. Internet explorer opens them just fine. .pdf files open fine also. Don't know? … (read more)

I updated Java, uninstalled and then re-installed Firefox. It will not open .aspx files. Internet explorer opens them just fine. .pdf files open fine also. Don't know?

Asked by Slim2N1 8 years ago

Last reply by jscher2000 7 years ago