• Solved

Firefox having problems with streams: This video is either unavailable or not supported in this browser. (Error #4000)

Hello, I'm having a problem on Windows 10. It's a fresh windows installation and I tried already some solutions: reinstalling firefox, deleting cache, refreshing firefox,… (read more)

Hello, I'm having a problem on Windows 10. It's a fresh windows installation and I tried already some solutions: reinstalling firefox, deleting cache, refreshing firefox, private windows, no add ons, trouble shoot mod. Nothing helped. The problem seems to be with live stream, either on twitch.tv or youtube.

Asked by probableUser 2 months ago

Answered by jscher2000 - Support Volunteer 2 months ago

  • Solved

Add Shortcut Button Missing

I noticed recently that my 'Add Shortcut' button has disappeared. I've been through other articles and they were of no help. I have 4 rows selected for shortcuts so there… (read more)

I noticed recently that my 'Add Shortcut' button has disappeared. I've been through other articles and they were of no help. I have 4 rows selected for shortcuts so theres no reason for it to be gone.

Asked by Cruz Ramos 1 week ago

Answered by Denys 1 week ago

  • Solved

cannot open or delete emails on google mail and youtube videos will not play. Had this problem a month ago. It's Firefox because I have no problem using MS Edge which I hate.

cannot open or delete emails on google mail and youtube videos will not play. Had this problem a month ago. It's Firefox because I have no problem using MS Edge which I h… (read more)

cannot open or delete emails on google mail and youtube videos will not play. Had this problem a month ago. It's Firefox because I have no problem using MS Edge which I hate.

Asked by puhpow66puhpow66 1 month ago

Answered by Kiki 1 month ago

  • Solved

bookmarks and history

"The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can caused this problem"… (read more)

"The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can caused this problem".

How do I resolve this problem?

Asked by gcotterl 1 week ago

Answered by Agent virtuel 1 week ago

  • Solved

Shortcuts on homepage disappeared

I opened Firefox this morning and all of my pinned shortcuts have disappeared. Shortcuts are enabled in the settings. I checked the browser.newtabpage.pinned pref on the … (read more)

I opened Firefox this morning and all of my pinned shortcuts have disappeared. Shortcuts are enabled in the settings. I checked the browser.newtabpage.pinned pref on the about:config and all of my pinned shortcuts are still there, but they're not appearing on the actual page itself. Are there any other settings that I'm not aware of?

Asked by kataro28 1 month ago

Answered by kataro28 1 month ago

  • Solved

Firefox 144.0.2 (64-bit) WIN freezes with youtube

Since a month or so, Firefox browser freezes when playing youtube videos. Simply closing the app and restarting won't do the trick, I am forced to open the WIN Task Manag… (read more)

Since a month or so, Firefox browser freezes when playing youtube videos. Simply closing the app and restarting won't do the trick, I am forced to open the WIN Task Manager and manually "end task" before I can watch youtube videos again ... until an hour later, or lucky a day later, the same drama unfolds. I run the newest version of each, Firefox and Windows 11. No new extensions or plugins have been added recently. What is to do here? I'm since Netscape on this route and would hate to switch to another browser... :-) Thanks in advance!

Asked by MalDenken 1 week ago

Answered by MalDenken 6 days ago

  • Solved

"Expand sidebar on hover" option for vertical tabs resets scroll position when I have a lot of tabs

I'm using the vertical tabs feature. I also tried enabling the "Expand sidebar on hover" option, which minimizes the side bar, and only expands it when you hover on it. … (read more)

I'm using the vertical tabs feature. I also tried enabling the "Expand sidebar on hover" option, which minimizes the side bar, and only expands it when you hover on it.

Issue: I have a lot of open tabs, and I'm usually working with the ones at the bottom of the list. When the bar minimizes the scroll position resets back to the beginning. So, every time I want to select a tab, I have to scroll back down, which makes this feature very hard to use.

Expected behavior: After the vertical bar minimizes, and I hover again, it should keep the scroll position.

Asked by razzvy20 5 months ago

Answered by razzvy20 4 months ago

  • Solved

Strange download from Firefox today - xRqj7qhl.html - Sixe: zero bytes - Kind: HTMLtext

I received this download from Firefox today, July 22, 2025: xRqj7qhl.html - Size: zero bytes - Kind: HTML text . I've never experienced this before. Is it legitimate? Th… (read more)

I received this download from Firefox today, July 22, 2025: xRqj7qhl.html - Size: zero bytes - Kind: HTML text . I've never experienced this before. Is it legitimate? Thanks

Asked by cecchijac 3 months ago

Answered by jscher2000 - Support Volunteer 3 months ago

  • Solved

Firefox deleted all my addons and passwords

I rebooted and launched FF, I was asked if I wanted to Refresh. Naturally I declined because I'm not an idiot. Now all my addons and passwords are gone. I would love t… (read more)

I rebooted and launched FF, I was asked if I wanted to Refresh. Naturally I declined because I'm not an idiot. Now all my addons and passwords are gone. I would love to have them back since I never asked for them to be deleted. I don't have an "Old Firefox Data" or whatever folder on my desktop, would have been cool for them to leave that there when they clobbered years of data and customization because Firefox thinks they should have more control over my PC than I do, but they didn't. Is there any way to get these back?

Asked by Steam Cheap 4 months ago

Answered by Steam Cheap 4 months ago

  • Solved

Windows 11 export import bookmarks?

Switch computers from windows 10 to windows 11. I downloaded bookmarks history from windows 10 on an external drive in html. On new windows 11 computer, I'm trying to… (read more)

Switch computers from windows 10 to windows 11. I downloaded bookmarks history from windows 10 on an external drive in html.

On new windows 11 computer, I'm trying to configure book marks. Turned off chatbot. Firefox or windows 11 is populating my sidebar with internet history I no longer use? How do I stop this and how do I import my bookmarks? i tried the import , similar to export, but it is not showing up?

Appreciate any help. Brian

Asked by brunau8 1 month ago

Answered by brunau8 1 month ago

  • Solved

the website blockclubchicago.org is blank on firefox, but not chrome. The website is included in the Enhanced Tracking Protection exception list.

the website blockclubchicago.org is blank on firefox, but not chrome. The website is included in the Enhanced Tracking Protection exception list. Why won't my firefox d… (read more)

the website blockclubchicago.org is blank on firefox, but not chrome. The website is included in the Enhanced Tracking Protection exception list. Why won't my firefox display any pages from this website, but they are all visible on the chrome browser? Please try it on your desktop browsers.

Asked by mknoop 5 months ago

Answered by Ed 5 months ago

  • Solved

Connexion impossible boite mail hotmail.com

Bonjour, je ne peux plus me connecter à ma boite mail hotmail.com depuis la version 144.0.2 (64bits) de Firefox Je suis avec Windows 11 famille 64 bits - 24H2 et 25H2 (j… (read more)

Bonjour, je ne peux plus me connecter à ma boite mail hotmail.com depuis la version 144.0.2 (64bits) de Firefox Je suis avec Windows 11 famille 64 bits - 24H2 et 25H2 (j'ai essayé avec les 2 versions) avec un compte local. Je choisis de me connecter avec un mot de passe et après avoir validé le mot de passe, j'arrive sur une page qui me dit d'utiliser un autre appareil ou une autre méthode de connexion. Je joins les fenêtres de connexion étape par étape Avec Google Chrome (que je ne veux pas utiliser), je me connecte sans problème à ma boite mail avec les même étapes décrites ci-dessus. Pouvez-vous m'apporter une solution ? Merci, Marc T.

Asked by marctramond1 2 days ago

Answered by marctramond1 2 days ago

  • Solved

Search Bookmarks in Bookmarks no longer works

Hello. Today I updated Firefox to Version 138.0.3 64 bit and I have found that the Search Bookmarks in Bookmarks no longer works where as in Version 138.0.1 it did. I hav… (read more)

Hello. Today I updated Firefox to Version 138.0.3 64 bit and I have found that the Search Bookmarks in Bookmarks no longer works where as in Version 138.0.1 it did. I have done a Refresh and it still does not work. I was wondering if anyone else is experiencing this problem. Is this a bug or something new with the current update. Could someone tell me how to solve this a using the Search Bookmarks function was a big help. Thank you.

Respectfully, Don

Asked by new_aged2perfection 5 months ago

Answered by new_aged2perfection 5 months ago

  • Solved

Auto-adding shortcuts?

How to disable the auto-adding of shortcuts feature from history to home page? It's really annoying, when I want to change my pinned shortcuts, I have to delete all auto … (read more)

How to disable the auto-adding of shortcuts feature from history to home page? It's really annoying, when I want to change my pinned shortcuts, I have to delete all auto added shorcuts (Even when the items on the screen are finished, they keep appearing in front of me, and this takes a long time). It is a must feature I think.

Asked by MithraWill 2 months ago

Answered by Paul 2 months ago