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MP4 files won't work in Firefox

As the title says, I cannot get MP4 files to play in Firefox, which renders several websites unusable. These sites work in Edge just fine, but I cannot get them to work i… (διαβάστε περισσότερα)

As the title says, I cannot get MP4 files to play in Firefox, which renders several websites unusable. These sites work in Edge just fine, but I cannot get them to work in my preferred browser. Everything is up to date, and I have all the codecs I could ever need installed, as well as the Windows N Media Feature Pack. The browser has been tested several times in troubleshooting mode, and I've even gone as far as running Windows in safe mode with networking to try to isolate the issue. I cannot get it to work at all. This is the 2nd device I've had this issue on, and it's driving me up a wall.

Any help or advice would be greatly appreciated.

Firefox 103.0 (64-bit) Windows 10 Pro N 21H2 19044.1865

Ερώτηση από natas.hastings 2 εβδομάδες πριν

Απάντηση από jscher2000 - Support Volunteer 1 εβδομάδα πριν

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Completely broken profiles

Hello team, I'm not sure what happened, but I was not able to open Firefox after restarting my PC. I currently run Windows 11 on a fully upgraded rig. Up until today, I h… (διαβάστε περισσότερα)

Hello team,

I'm not sure what happened, but I was not able to open Firefox after restarting my PC. I currently run Windows 11 on a fully upgraded rig.

Up until today, I have been trouble free. Error 1: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window."

I tried several options - and have been googling/trying several steps for a couple of hours (after each step, I restarted the PC):

1. Uninstalled and then Reinstalled a fresh copy of Mozilla 2. Attempted to use Command Lines to open Firefox https://wiki.mozilla.org/Firefox/CommandLineOptions 3. Opened Profile Manager and attempted to create a new profile - when I did this the new profile would not display in the Profile Manager, but it would display in the Profiles folder under Appdata [I tried this multiple times] 4. Deleted the profiles.ini file

After deleting the .ini file Error 2: "Your Firefox profile cannot be loaded. It may be missing or inaccessible." 1. Uninstalled and then Reinstalled a fresh copy of Mozilla 2. Opened Profile Manager and attempted to create a new profile. After following the Profile Wizard, another error pops up: "An unexpected error has prevented your changes from being saved."

I am completely stumped. I hope you can help, Sean

Ερώτηση από sean.oneill.29 2 μήνες πριν

Απάντηση από cor-el 2 μήνες πριν

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I can't delete my Firefox account

A while ago I made a Firefox account with my Yahoo email address as the primary email, and my Outlook email address as the secondary email. Eventually I realized that I d… (διαβάστε περισσότερα)

A while ago I made a Firefox account with my Yahoo email address as the primary email, and my Outlook email address as the secondary email. Eventually I realized that I didn't need my Yahoo email account anymore, so I deleted it, forgetting that it was being used as the primary email for my Firefox account. Now I can't remove my Outlook email from my Firefox account without verifying my Yahoo email account, and I can't even delete the Firefox account since it was made under the Yahoo email account as a primary email address.

Now I can't use my Outlook email address to create a new Firefox account either.

Ερώτηση από vivek95148 2 εβδομάδες πριν

Απάντηση από vivek95148 2 εβδομάδες πριν

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How does Mozilla Support rate Questions?

So far i asked a handful questions here. Some are being replied while others are ignored. How do i get more attention on my questions and how is determined if they are im… (διαβάστε περισσότερα)

So far i asked a handful questions here. Some are being replied while others are ignored. How do i get more attention on my questions and how is determined if they are important or not? support.mozilla.org behaves in a wired way here, it's not like a Forum. Im certain admins have full sight over all topics here while a normal user like me, feels pretty lost.

Why do some questions show the amount of views while others dont? -See attached screenshots https://i.postimg.cc/QtyPZ0Nh/1.png https://i.postimg.cc/q7QSjp9t/2.png

Ερώτηση από Firefox_Beginner 9 μήνες πριν

Απάντηση από Amelia 9 μήνες πριν

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Suspicious domain mozilla-api[.]com

Can someone confirm if mozilla-api[.]com is an official Mozilla domain? It was registered 7 months ago with Namecheap registrar. I am unable to find any overlap with of… (διαβάστε περισσότερα)

Can someone confirm if mozilla-api[.]com is an official Mozilla domain? It was registered 7 months ago with Namecheap registrar. I am unable to find any overlap with official Mozilla infrastructure and I suspect this is a malicious domain.

Ερώτηση από Work Lappy 2 μήνες πριν

Απάντηση από Work Lappy 2 μήνες πριν

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No window was opened, but window's name that closed still appear

Problems that I faced: 1. There is no firefox window opened, but "new staff train - google drive" window name still appear. Please see attachments. ( the "new staff train… (διαβάστε περισσότερα)

Problems that I faced: 1. There is no firefox window opened, but "new staff train - google drive" window name still appear. Please see attachments. ( the "new staff train" was a window that was closed long time ago) 2. Normally, when one minimises a window and clicks the firefox, the minimize window will pop up, but now it won't.

I did try to delete, uninstall and reinstall firefox, but the problem still exists. Please advise what I can do to solve this inconvenience. Currently, I'm using Firefox 89.0

Ερώτηση από sooying5966 1 έτος πριν

Απάντηση από sooying5966 1 έτος πριν

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Extremely urgent

I just allowed an update to my computer from Mozilla called software updater and now I can't use duckduckgo to search the web. I had to use google to get to this page for… (διαβάστε περισσότερα)

I just allowed an update to my computer from Mozilla called software updater and now I can't use duckduckgo to search the web. I had to use google to get to this page for help. Let me know right away how to remove the mozilla updater from my computer and get back to the firefox browser that works. This is interfering with my web searches and banking. This is extremely urgent.

Ερώτηση από alubbers 6 μήνες πριν

Απάντηση από Terry 6 μήνες πριν

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Security of Firefox: Is It Still Secure?

Greetings everyone, I know this may sound like a strange question, but I'm very serious. I just read an article that says Firefox is in danger of being shut down I've al… (διαβάστε περισσότερα)

Greetings everyone,

I know this may sound like a strange question, but I'm very serious.

I just read an article that says Firefox is in danger of being shut down

I've always seen Firefox as the most trustworthy web browser and so I was planning on using Firefox as my main web browser for the long term. However, after reading this article I've become very anxious.

Article link: https://news.slashdot.org/story/20/08/15/1955237/can-firefox-be-saved

I'd really appreciate any advice.

Ερώτηση από Helpless_Quest 1 έτος πριν

Τελευταία απάντηση από AliceWyman 1 έτος πριν

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Browsing on local development URLs derives on "Unable to connect"

Hi there, I'm using my PC for local web development. I use Firefox as my regular browser and recently, in order to distinguish between personal time and development time,… (διαβάστε περισσότερα)

Hi there,

I'm using my PC for local web development. I use Firefox as my regular browser and recently, in order to distinguish between personal time and development time, I've established a new profile just for development purposes.

The local website I can't reach is "site.local.dev". My OS is Ubuntu 20.04 and that URL points to a local IP on my network (resolved via /etc/hosts file on my PC).

Funny thing is that: - In dev-profile: site.local.dev does not work => "Unable to connect" and the URL bar shows https://site.local.dev even if I force it to http:// - In personal-profile: site.local.dev does work :P

I have tried with CLI tools like "wget", "hosts", "ping", "telnet" and so on and the site loads ok. Even I have used Dillo (damn simple web browser) and the site loads ok also.

Things I've tried so far: - Suggestions at https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can - Suggestions at https://support.mozilla.org/en-US/questions/1011327 (similar issue, not exactly the same).

It must be a silly thing but I'm out of options now. Perhaps anybody has faced to this situation in the past: any suggestion on this issue?.

Thanks in advance, Ibon.

Ερώτηση από Ibon Castilla Varela 6 μήνες πριν

Απάντηση από Ibon Castilla Varela 3 μήνες πριν

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deletion of firefox account with the email address [email address] needed as i have no longer got access to it

GOOD DAY MOZILLA FIREFOX SUPPORT HOW ARE YOU.S TODAY I WOULD LIKE YOUR HELP WITH DELETING MY FIREFOX ACCOUNT WITH THE EMAIL ADDRESS [email address] as i no longer have a… (διαβάστε περισσότερα)

GOOD DAY MOZILLA FIREFOX SUPPORT HOW ARE YOU.S TODAY I WOULD LIKE YOUR HELP WITH DELETING MY FIREFOX ACCOUNT WITH THE EMAIL ADDRESS [email address] as i no longer have access to it at all

Ερώτηση από donovangregg 9 μήνες πριν

Τελευταία απάντηση από Paul 9 μήνες πριν

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Delete Firefox account without email access

I'd like to permanently delete an account that was set up on a former employers email address (email which I can no longer access). Unfortunately I have no secondary emai… (διαβάστε περισσότερα)

I'd like to permanently delete an account that was set up on a former employers email address (email which I can no longer access). Unfortunately I have no secondary email address recorded in the account and all the options on my account page require that I authorise any changes from the email account which I can no longer access.

Is it possible to delete the account?

Ερώτηση από Paul JCH 3 μήνες πριν

Απάντηση από Paul 3 μήνες πριν

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Firefox fails to start even after reinstall

On one computer I have deleted everything from Firefox including the folders within Apps Roaming except for one folder. There in one folder "41A66E7EE5E1" within Profile… (διαβάστε περισσότερα)

On one computer I have deleted everything from Firefox including the folders within Apps Roaming except for one folder. There in one folder "41A66E7EE5E1" within Profiles which I cannot delete. It holds the files prefs.js and sessionCheckpoints.json which were created at 20/02/2021 and I cannot delete those.

My new installation is dated 24/07/2021.

There is nothing in the properties of those two files to suggest an issue. I do find however that when I seek to change the Property/Security to Administrator (I should be able to do that) I receive a dialog box that "the file or directory is corrupted and unreadable".

Please advise on how I address this.

Ερώτηση από brijohnnow 1 έτος πριν

Απάντηση από brijohnnow 1 έτος πριν

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deletion of firefox account with the email address [email address] needed as i have no longer got access to it

GOOD DAY FIREFOX OR MOZILLA SUPPORT I WOULD LIKE YOU.S TO DELETE MY FIREFOX ACCOUNT WITH THE EMAIL ACCOUNT [email address] as i have no longer got access to it

Ερώτηση από donovangregg 9 μήνες πριν

Τελευταία απάντηση από Paul 9 μήνες πριν

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Boot up issue

Can you put one of those hourglass "wait" symbols to show on the next update because I never know if Firefox has booted or not and if you hit it again, it corrupts the ne… (διαβάστε περισσότερα)

Can you put one of those hourglass "wait" symbols to show on the next update because I never know if Firefox has booted or not and if you hit it again, it corrupts the next boot and wastes a bunch of time.

Ερώτηση από fishn.jim2 8 μήνες πριν

Απάντηση από FredMcD 8 μήνες πριν

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My Firefox Menu container is small, only shows 4 options and I have to scroll lots to get to the bottom

My firefox menu all the sudden changed from the full drop down to only showing 4 options. Now I have to scroll quite a bit to see all the options. See attached picture. A… (διαβάστε περισσότερα)

My firefox menu all the sudden changed from the full drop down to only showing 4 options. Now I have to scroll quite a bit to see all the options. See attached picture. Anyone know how to fix this? This is very annoying...

Ερώτηση από bridgetsuing 1 έτος πριν

Απάντηση από jscher2000 - Support Volunteer 1 έτος πριν

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Showing only a's or e's on websites

Recently a problem appeared in certain websites (Wikipedia for example) since I updated Firefox. It would only show me a's or e's. See attached image. I have already trie… (διαβάστε περισσότερα)

Recently a problem appeared in certain websites (Wikipedia for example) since I updated Firefox. It would only show me a's or e's. See attached image. I have already tried to refresh Firefox, turning off extensions and themes, but to no avail. There is no such problem with Google Chrome. I have shared configuration info. Thank you for the help!

Ερώτηση από viko.dichev 1 έτος πριν

Απάντηση από cor-el 1 έτος πριν