How can I watch webm videos in Firefox on Windows?

Neither the [`` example on MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/video ) nor the [HTML5 WebM Video Test here](https://www.tekeye.uk/ht… (read more)

Neither the [`

So how do I get them running? A significant portion of the internet runs on WebM and the fact that Mozilla's own dev docs can't show examples is a good indication of a problem.

Asked by Thun Fremlinc 2 hours ago

Last reply by Thun Fremlinc 1 hour ago

bookmarks not saving correctly

For the last few weeks I have been unable to save new bookmarks into the folder of my choice. Instead I can only save new bookmarks into the last folder I created. I ca… (read more)

For the last few weeks I have been unable to save new bookmarks into the folder of my choice. Instead I can only save new bookmarks into the last folder I created. I cannot navigate to a different pre-existing folder. This problem only occurs when using Firefox on my Android cell phone, but not on my PC. However, I can still view and use all of my previous folders and bookmarks when wishing to open a new website, per usual. Thank you

Asked by jnhs 17 hours ago

Last reply by jnhs 7 hours ago

I've lost all my Windows with multiple tabs!

I am FURIOUS with the latest update! I put my computer on "Sleep" for a couple of hours this morning, and when I cam back to it, the screen was locked up and I had to res… (read more)

I am FURIOUS with the latest update! I put my computer on "Sleep" for a couple of hours this morning, and when I cam back to it, the screen was locked up and I had to restart my computer. When I finally came online, everything had changed! I've had multiple Windows with lots of tabs running without any problems for a LONG time, until today! Now, EVERYTHING IS GONE!

Firefox Helper Tool

MacBook Pro M4, OS v 26.0.1 Firefox runs fine as administrator. There is an issue with standard users. I have completely uninstalled and reinstalled Firefox multiple time… (read more)

MacBook Pro M4, OS v 26.0.1 Firefox runs fine as administrator. There is an issue with standard users. I have completely uninstalled and reinstalled Firefox multiple times from the Firefox webpage. When I try to run Firefox as a standard user a screen pops up. Firefox is trying to install a new helper tool - enter admin name and password. After I enter the user name and password the pop up screen disappears. If I click on the Firefox icon the same pop up screen appears again. I can select cancel, however, when I go to the Firefox icon it is bouncing up and down for several minutes. If I click on the Firefox icon again after it stops bouncing the process repeats itself.

One last thing Firefox was running fine until the latest update on 11/02/2025.

How can I resolve this issue?

Regards, David

Asked by corleydl 9 hours ago

Spurious Error 403

I am a pensioner in te UK. Due to restricted mobility I spend a lot of time using Firefox to access many web sites. This normally works perfectly. Today I tried to access… (read more)

I am a pensioner in te UK. Due to restricted mobility I spend a lot of time using Firefox to access many web sites. This normally works perfectly. Today I tried to access the web site of national chain store specialising in outdoor clothing and equipment because I need a new showerproof jacket. I have never used that site before, yet Firefox reported Error 403 : Forbidden. Have you people never been told tat error messages are supposed to be useful? What is Forbidden. Why when it has not happemed before?

The web site is https://www.millets.co.uk/

I have a web site so I have other browsers just for checking for layout problems.

I tried Chromium, same error but the message said You are not authorised to access this site. Presumably that is what your incompetent message should have said. But why should a pensioner trying to buy something from a chain store ever need any sort of authorisation?

I tried Opera. Connected me no problem!

I tried Edge. Connected me no problem.

Clearly somebody somewhere is an incompetent idiot, but it isn't me. So who is it? If it is yourselves then please do something to fix this.

Asked by d.lazenby 1 day ago

Last reply by d.lazenby 10 hours ago

Profiles got rid of my bookmarks and history.

When I opened the browser, it prompted me about profiles. I clicked on it out of curiosity. However, when I tried to back out of it because I don't need any profiles, it … (read more)

When I opened the browser, it prompted me about profiles. I clicked on it out of curiosity. However, when I tried to back out of it because I don't need any profiles, it created one anyway. Then whenever I would open the browser, it would prompt me to choose a profile. I don't need any profiles, and it was annoying that there was an extra step. There was the button to turn off the choose profile screen, but I guess I was steadfast in my annoyance, so I deleted the profiles to make it unable to show up. This, however, signed me out of Firefox, and when I logged back in, none of my bookmarks or history were there. I tried the sync option because I at least still had my history on the app, but it did not work. Frankly, I don't care, and I'll just make the bookmarks again. And maybe it should have made sense that deleting the profiles would delete everything with it. But I still think it's insanely stupid to not be able to back out of creating a profile. Took up my time and simultaneously gave me more work to do. I don't want any help or support just needed to voice my feelings.

Asked by Tyuh 11 hours ago

regarding youtube is not working coractly

when i m opening youtube it shows my subscribed channel and content but every where it shows please sign in or show me sign in look at the screen shot i have posted at r… (read more)

when i m opening youtube it shows my subscribed channel and content but every where it shows please sign in or show me sign in look at the screen shot i have posted at right there is showing my profile pitcher and at right it show's me to sign in

Asked by hemantdabra6 13 hours ago

https://www.duolingo.com Mikrofon funktioniert im FIREFOX !!!

KI antwort: Wenn das Duolingo-Mikrofon nicht funktioniert, müssen Sie zuerst die Mikrofonberechtigungen für die App überprüfen und sicherstellen, dass Duolingo Zugriff au… (read more)

KI antwort: Wenn das Duolingo-Mikrofon nicht funktioniert, müssen Sie zuerst die Mikrofonberechtigungen für die App überprüfen und sicherstellen, dass Duolingo Zugriff auf das Mikrofon hat. Falls das nicht hilft, aktualisieren Sie die App und starten Sie Ihr Gerät neu. Als letzte Schritte können Sie auch versuchen, sich ab- und wieder anzumelden oder einen anderen Browser zu verwenden', falls Sie Duolingo im Web nutzen. Ich bin ein Fun von Firefox - Möchte weiter benutzen! - und möchte mein auspache verbessern, es ist erforderlich Microfon zu benutzen. Mikrofonzugriff kann nicht gesetzt werder - Siehe Anhang -

Bei Edge funktioniert - Siehe Anhang -

M.f.G. Ferenc Horvath

Asked by ferenc.horvath 15 hours ago

mTLS not working on newer version (>128, Debian)

Hi, I am using mTLS to authenticate my computers reaching websites I manage. I imported client certificate on firefox and cloudflare is checking if the client is sending… (read more)

Hi,

I am using mTLS to authenticate my computers reaching websites I manage. I imported client certificate on firefox and cloudflare is checking if the client is sending the right certificate. I am using Debian and Windows. On Debian (13), everything was working great until the version 140 ESR. I don't know why but the client certificate is not sent to cloudflare, sometime it is (when CTRL+F5) but no CSS is rendered. So I can't reach my websites. Firefox is still asking for the right certificate to send but that's all. This is weird because on the same version on Windows, with the same certificate, it is working. I tried newer version (144.0.2) on Debian but it is not working. The version I use at the moment is 128.14.0esr. Cloudflare is blocking the traffic because no certificate is sent. If I disable the rule, it is working.

Could someone help me? Feel free to ask for more details.

Hugo

Asked by hugo.racape 21 hours ago