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YouTube does not load properly in Firefox, but does in other browsers.

Yesterday or the day before, I tried going onto YouTube using Firefox, as I usually do, and this happened (see attached image). I tried clearing the cache and cookies, a… (閱讀更多)

Yesterday or the day before, I tried going onto YouTube using Firefox, as I usually do, and this happened (see attached image). I tried clearing the cache and cookies, and restarted my whole computer, and nothing changed. Firefox loads all other websites I frequently use just fine, and Chrome works just fine with YouTube, but for some reason, Firefox and YT are not mixing right now. Anyone have any suggestions?

JAKQ7111 於 4 年前 詢問

cor-el 於 4 年前 解答

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Firefox Won't Start - Claims it is Already Open

Firefox will not start. It claims to be already running, but that doesn't seem to be the case. I have tried creating a new user profile but when I try to open Firefox no… (閱讀更多)

Firefox will not start. It claims to be already running, but that doesn't seem to be the case.

I have tried creating a new user profile but when I try to open Firefox now, the "choose user profile" menu pops up. I have tried the new profile and they old one, and both give the same error message. "Firefox cannot use the profile "Default User" because it is in use. To continue, close the running instance of Firefox or choose a different profile."

There is an entry for firefox.exe in the "details" menu of my task manager, and nowhere else. When I try to end that task, I get the following error: "the operation could not be completed - Access is denied."

Due to some troubleshooting research, I've tried deleting the parent.lock file from my profile folder, but I get this error- "the action can't be completed because the file is open in Firefox."

I tried transferring my bookmarks and preferences from Firefox to Chrome, but I got a similar error suggesting that Firefox was already open and I would have to close it first.

I have also turned off my computer and uninstalled and reinstalled Firefox multiple times.

I'd really rather not lose all of my Firefox bookmarks, add-ons, and preferences. I also prefer using Firefox to Chrome, so if anyone can help me out I'd really appreciate it. I don't know what else to try.

My PC runs Windows 10, by the way.

jimmyjkjr 於 5 年前 詢問

cor-el 於 5 年前 解答

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Linux/Ubuntu and Windows: creating firefox profile for different users from command line

Hi, I would like to create from command line by using the administrator user of a system the same firefox profile with plugin and customization for each user of the same … (閱讀更多)

Hi, I would like to create from command line by using the administrator user of a system the same firefox profile with plugin and customization for each user of the same system. I cannot use sync feature for this purpose.

I know from here edit https://developer.mozilla.org/en-US/...d_Line_Options https://developer.mozilla.org/en-US/docs/Mozilla/Command_Line_Options ~J99that the correct syntax is the following firefox -CreateProfile "JoelUser c:\internet\joelusers-moz-profile". On Linux/Ubuntu the following piece of code allows to create a profile for the sudo user


user=$(sudo logname)
firefoxProfile="/home/$user/.mozilla/firefox"
if [ ! -d "$firefoxProfile/m4v6pi7q.profile" ]; then
    rm -rf $firefoxProfile
    firefox -CreateProfile "profile $firefoxProfile/m4v6pi7q.profile"
        
    7z x -y ./m4v6pi7q.profile.7z
    mv ./m4v6pi7q.profile/* "$firefoxProfile/m4v6pi7q.profile"
    sudo chown -R $user:$user "/home/$user/.mozilla/"
    rm -rf m4v6pi7q.profile.7z m4v6pi7q.profile
fi

On Windows the following piece of code allows to create a profile for the administrator user


$ProgramsPath=${env:ProgramFiles}
$FirefoxProfile="$env:USERPROFILE\AppData\Roaming\Mozilla\Firefox\Profiles\u9w6vbcj.profile"
if(-Not (Test-Path $FirefoxProfile))
{
	$LocalProfile="$env:USERPROFILE\AppData\Local\Mozilla\Firefox\Profiles\*"
	if(Test-Path $LocalProfile)
	{
		Remove-Item $LocalProfile -recurse
	}
	
	$RoamingProfile="$env:USERPROFILE\AppData\Roaming\Mozilla\Firefox\Profiles\*"
	if(Test-Path $RoamingProfile)
	{
		Remove-Item $RoamingProfile -recurse
		Remove-Item "$env:USERPROFILE\AppData\Roaming\Mozilla\Firefox\profiles.ini"
	}
	& "$ProgramsPath\Mozilla Firefox\firefox.exe" -CreateProfile "profile $FirefoxProfile"

	& "$ProgramsPath\7-Zip\7z.exe" x -y .\u9w6vbcj.profile.7z
	move .\u9w6vbcj.profile\* $FirefoxProfile -force
	Remove-Item .\u9w6vbcj.profile.7z
	Remove-Item .\u9w6vbcj.profile
}

How can I create firefox profiles from a sudo/administrator user for each user (sudo/administrator and not sudo/administrator) of the system? On Linux/Ubuntu I tried with this code


usersList=$(getent passwd | grep -vE '(nologin|false)$' | \
awk -F: -v min=`awk '/^UID_MIN/ {print $2}' /etc/login.defs` \
-v max=`awk '/^UID_MAX/ {print $2}' /etc/login.defs` \
'{if(($3 >= min)&&($3 <= max)) print $1}' | \
sort -u)

for systemUser in $usersList; do
    echo $systemUser

    firefoxProfile="/home/$systemUser/.mozilla/firefox"
    firefox -CreateProfile "profile $firefoxProfile/m4v6pi7q.profile"
    7z x -y ./m4v6pi7q.profile.7z
    mv ./m4v6pi7q.profile/* "$firefoxProfile/m4v6pi7q.profile"
    chown -R $systemUser:$systemUser "/home/$systemUser/.mozilla/"
    rm -rf m4v6pi7q.profile.7z m4v6pi7q.profile
    
done

but it does not work and this is the output


sudo ./user.sh 
foo
Success: created profile 'profile /home/foo/.mozilla/firefox/m4v6pi7q.profile' at '/home/foo/.mozilla/firefox/m4v6pi7q.profile/prefs.js'
admin
Success: created profile 'profile /home/admin/.mozilla/firefox/m4v6pi7q.profile' at '/home/admin/.mozilla/firefox/m4v6pi7q.profile/prefs.js'
jack
Success: created profile 'profile /home/jack/.mozilla/firefox/m4v6pi7q.profile' at '/home/admin/.mozilla/firefox/m4v6pi7q.profile/prefs.js'
chown: cannot access ‘/home/jack/.mozilla/’: No such file or directory
zorro
Success: created profile 'profile /home/zorro/.mozilla/firefox/m4v6pi7q.profile' at '/home/admin/.mozilla/firefox/m4v6pi7q.profile/prefs.js'
chown: cannot access ‘/home/zorro/.mozilla/’: No such file or directory

Why for the first two users is the directory for profile corretly set, while for the other is the directory of the user that executes the script /home/admin/.mozilla/firefox/m4v6pi7q.profile? I'm sorry for my very long question. Thank you


edit fixed link ~J99

erotavlas 於 4 年前 詢問

erotavlas 於 4 年前 解答

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Firefox will not install on any of my Windows 10 computers. It just continuously has a moving bar, saying 'Now installing.'

Over the last month or so, I've had trouble installing Firefox version 55 (latest version) on any new Windows 10 laptops. It just continuously has a moving bar, saying 'N… (閱讀更多)

Over the last month or so, I've had trouble installing Firefox version 55 (latest version) on any new Windows 10 laptops. It just continuously has a moving bar, saying 'Now installing.' This is on Windows 10 ver 10.0.15063, which is the latest version of Windows 10, to my knowledge. This happens on all my new computers, right out of the box after installing a fresh copy of Windows 10. Does anyone have any ideas on how to get it to install? I've tried disabling Windows Defender, which didn't help.

jodobr 於 3 年前 詢問

FredMcD 於 3 年前 解答

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How do I fix SEC_ERROR_LIBRARY_FAILURE?

I'm using Firefox Quantum and the day I installed it, everything was working great. But every since I've rebooted my PC, now I often get the error code SEC_ERROR_LIBRARY… (閱讀更多)

I'm using Firefox Quantum and the day I installed it, everything was working great. But every since I've rebooted my PC, now I often get the error code SEC_ERROR_LIBRARY_FAILURE when I try to load pages, like Google. Please advise.

rb8888 於 3 年前 詢問

jscher2000 於 3 年前 解答

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Firefox installs in Windows 10 but doesn't work

I've upgraded my 64-bit Windows 7 Pro installation to Windows 10, taking the opportunity (at the same time) to install an SSD and re-installing everything from scratch. I… (閱讀更多)

I've upgraded my 64-bit Windows 7 Pro installation to Windows 10, taking the opportunity (at the same time) to install an SSD and re-installing everything from scratch. I have tried (several times) to re-install Firefox, and whilst it appears to install OK, if I click on the Firefox icon to start it I get an error message: "Windows cannot access the specified device, path or file C:\Program Files (x86)\Mozilla Firefox\firefox.exe. You may not have permission to access this file."

I have tried running it with the Windows 10 Firewall both turned off and on - but this didn't make any difference. (My primary Firewall is Kaspersky Total Security.) Edge, Internet Explorer & Opera browsers work OK, but Google Chrome doesn't work either. Is there a clue to the problem here? I hope someone can solve it for me as I prefer to use Firefox over Opera. Thanks for your responses.

tallboyrip 於 5 年前 詢問

FredMcD 於 5 年前 解答

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Firefox comes up a blank screen after update.

I received an automatic update on Firefox. After the update I can no longer open Firefox. Just a black tab shows. I uninstalled it and re-installed and still nothing. I e… (閱讀更多)

I received an automatic update on Firefox. After the update I can no longer open Firefox. Just a black tab shows. I uninstalled it and re-installed and still nothing. I even did a reset and no success. I'm at the point of uininstalling for good.

jhepple 於 3 年前 詢問

cor-el 於 3 年前 解答

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Every Firefox update fails, and now Firefox will not even start.

For days, every time I have started Firefox, it asked whether I wanted an update. Every time I clicked Yes to update Firefox, the update failed. So I found the Mozilla … (閱讀更多)

For days, every time I have started Firefox, it asked whether I wanted an update. Every time I clicked Yes to update Firefox, the update failed. So I found the Mozilla site for installing the latest version of Firefox. The installation seemed to go fine, but Windows 10 now gives the following message:

"Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item."

I see nothing unusual in the Properties for what seems to be the Firefox executable. Of course, I can switch to GoogleChrome, but I prefer Firefox; in addition, all of my Firefox bookmarks are now gone.

Solution to these problems?

Wallet 於 3 年前 詢問

Wallet 於 3 年前 解答

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Bookmarks sync problems: Bookmarks keep rearranging themselves in the bookmarks toolbar, and do not sync completely on Windows and Android.

My setup I'm using Firefox 47.0 on Fedora (64-bit GNU/Linux) with GNOME shell, and on Windows 10 (64-bit). I also have Firefox Sync on an Android tablet, but I don't do a… (閱讀更多)

My setup

I'm using Firefox 47.0 on Fedora (64-bit GNU/Linux) with GNOME shell, and on Windows 10 (64-bit). I also have Firefox Sync on an Android tablet, but I don't do as much web browsing on my tablet, so I haven't needed to look at the bookmarks there...


The problem(s)

On Fedora, the bookmarks in the Firefox bookmarks toolbar rearrange themselves. The bookmarks in one folder shift from the bottom to the top, and some bookmarks in the toolbar shift from left to right. I arrange my bookmarks by loose priority, so this annoying. Whenever I notice the bookmarks being out of order, I drag them back to where they were, but they always move themselves again later. This has been an ongoing issue for a couple months; I've only seriously attempted to troubleshoot the issue over the past week or so, and I'm not having any luck.

I don't think I've ever noticed the bookmarks moving themselves in the middle of a session, so I believe it's actually happening when I close or launch Firefox. However, reproducing this issue has been tricky, since the bookmarks do not *always* shuffle themselves every time I launch Firefox. Depending on how often I open/close the application, I may notice the bookmarks moving themselves once every other day, or a couple times in a single day.

This may be a separate issue, but I noticed it around the same time: On Windows 10, my bookmarks do not sync at all. There three or four bookmarks in the toolbar, but these do not get updated when I change them on my Linux machine, and none of the other bookmarks have synced to the Windows machine.


Things that I've already tried

I've tried reverting my bookmarks to a recent automatic backup (Library > Import and Backup > Restore). No change.

I've tried disabling all addons. No change.

I tried refreshing Firefox, to "reset to factory defaults". No change.

I tried deleting the file `xulstore.json` in my Firefox profile. No change.

I tried installing and running the Places Maintenance extension. I didn't entirely understand all the text output it generated while running, but I don't think it found any real errors. Anyway, no change.

I tried backing up my exports to a JSON file, then closing Firefox, then deleting the places.sqlite file, then restarting Firefox, and importing the bookmarks JSON file. No change.

Bookmarks still rearrange themselves on Linux and do not sync at all on Windows  :(

Android-the-Andrew 於 4 年前 詢問

Android-the-Andrew 於 4 年前 解答

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Crash when 'Save Image As'

It crashes both firefox & waterfox, Even chrome seems to be having issues when trying to save an image. (I'll check chrome forums aswell) but its quite annoying that … (閱讀更多)

It crashes both firefox & waterfox, Even chrome seems to be having issues when trying to save an image. (I'll check chrome forums aswell) but its quite annoying that i cant save anything. There is no error being provided and i cant exactly describe the problem other than when trying to save an image or anything with 'Save image as' or similar. It crashes.

MrAwais 於 3 年前 詢問

FredMcD 於 3 年前 解答

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Which process should I end to kill Firefox 57.0?

Occasionally, any piece of complex software will stop responding, and need to be forcibly shut down. I had such an event today when the right-click (context) menus and t… (閱讀更多)

Occasionally, any piece of complex software will stop responding, and need to be forcibly shut down. I had such an event today when the right-click (context) menus and title-bar menus wouldn't appear. However, since upgrading to FF 57, I now see about 6 Firefox tasks and 6 firefox.exe processes in the Task Manager (Windows 10).

I like the feature of being able to restart Firefox (after killing it) and have my previous session restored, but the processes aren't really distinguishable in Task Manager, so I don't know which one to end/kill. I had to kill a few of them today before I stumbled upon the "main" process and Firefox disappeared. Can you help me to identify the main process for next time?

azinyk 於 3 年前 詢問

azinyk 於 3 年前 解答

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every website connection not secure, won't load images after exception

I was having issues with pop-up adds on a select few websites and was a bit concerned i had inadvertently downloaded some adware or other malware. So i ran a local scan w… (閱讀更多)

I was having issues with pop-up adds on a select few websites and was a bit concerned i had inadvertently downloaded some adware or other malware. So i ran a local scan with ESET and looked around for methods to remove malware that may or may not have been present. One of the posts i found (i cant find it now >.<) said to check add-ons for anything unusual and to hit "Refresh Firefox" after removing them. I saw only AdblockPlus so i hit 'Refresh Firefox'

Its after that point that i immediately had issues obtaining certificates for almost every website, it didnt matter that i had been using it fine 10 minutes ago. But even if i added an exception the website would only load as raw text, no video, no images (i tried to upload a picture but its not letting me for some reason). at this point i installed chrome (which works fine) and tried reinstalling Firefox (probably not a good idea in hindsight), which did nothing noticeable to solve the issue.

At this point I've done everything suggested here https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

lorage 於 4 年前 詢問

philipp 於 4 年前 解答

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Firefox freezes if I have more than 4 or 5 tabs open

For the past few months (it's October 2017) after starting the browser I can open 3 tabs tops before the browser slows down incredibly, things load slower, videos stop an… (閱讀更多)

For the past few months (it's October 2017) after starting the browser I can open 3 tabs tops before the browser slows down incredibly, things load slower, videos stop and start, ads don't close quickly. Eventually, 3 tabs or more tabs, the whole thing comes to a halt and freezes and I have to restart. I've cleared my history. Doesn't help. I don't know what to do. Thanks for any help.

JenniferOcious 於 3 年前 詢問

FredMcD 於 3 年前 解答

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Secure Connection failed, I tried all the solutions to fix this problem, however, other browsers can open sites so easily..what could be the problem ?

I first thought its because of the MacAfee Antivirus but after uninstalling it, Firefox still didn't work. I also tried the instructions here.... https://support.mozilla.… (閱讀更多)

I first thought its because of the MacAfee Antivirus but after uninstalling it, Firefox still didn't work. I also tried the instructions here....

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can?redirectlocale=en-US&redirectslug=Firefox+cannot+load+websites+but+other+programs+can

But the problem still exists... Firefox is the most browser am comfortable with...so please help me fix this. Thank you soo much in advance..

SaharMagdy 於 3 年前 詢問

FredMcD 於 3 年前 解答

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I can't get the You Tube site to open on just Firefox.

Hi. I can't get You Tube to open on Firefox. All other sites work on Firefox and You Tube works on other browsers. If I click on a specific video saved to my favorites, … (閱讀更多)

Hi. I can't get You Tube to open on Firefox. All other sites work on Firefox and You Tube works on other browsers. If I click on a specific video saved to my favorites, it will play but the site itself doesn't show. Not sure what to do.

gmaholly10 於 3 年前 詢問

cor-el 最近回覆 於 3 年前

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Firefox loads in taskbar but doesn't display on desktop.

Firefox was working until yesterday. Now it loads in the taskbar and popups mini windows but never opens on the desktop so it can be used. I have uninstalled/reinstalle… (閱讀更多)

Firefox was working until yesterday. Now it loads in the taskbar and popups mini windows but never opens on the desktop so it can be used. I have uninstalled/reinstalled, rebooted...nothing helps. HELP!!! I want my Firefox back.

cascher50 於 4 年前 詢問

cascher50 於 4 年前 解答

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whats wrong with firefox???? its reporting EVERY site as unsafe

have a new windows 10 computer and have tried to use Firefox on it but cant as it is reporting EVERY SINGLE WEBSITE as unsafe even MOZILLA , Ive had to take it off as it… (閱讀更多)

have a new windows 10 computer and have tried to use Firefox on it but cant as it is reporting EVERY SINGLE WEBSITE as unsafe even MOZILLA , Ive had to take it off as it absolutely useless as it is

amosf64 於 3 年前 詢問

amosf64 於 3 年前 解答