Firefox Community Forum

I am a designer of Systems for Sustainability and Renewable Energy. I am receiving the message "HTML5:Video file not found" when trying to watch videos online which is stopping me from viewing a lot of new video content.

Can I / How do I resolve this situation?

Hello, when I browse the internet, randomly the certificates seem to break as I get https certificates for sites that seem to have nothing to do with the sites that i intend to visit. Then errors like the ones in the screenshots appear. Usually reloading the website helps and then the certificate displayed seems to be correct. I did make sure to upgrade to the latest version of FF (136.0) and I did clear all cookies, but it didnt help. I do not really have any idea where to start searching or what might cause this, tia for help. kind regards Thomas

Dear Sir or Madam: I seem to have a compatibility problem with my firefox browser. Not always, but often, I get a 502 error when I try to log in to my bank account. After contacting my bank, I found out that their program is not compatible with firefox and that I should use Google, which choose to avoid. Is there a patch or fix that can get rid of the 502 error and allow me to continue using Firefox, which I have used for almost twenty years. I don't want to switch to Google, EVER! Please let me know what options I might Have.

Respectivly, Louis Osip

Just refusing to load websites. Reddit twitch discord other stuff. Tried running firefox in safe mode. Doesn't fix shit. Turned off proxy networks and that worked for a while but problems back now

Recently, whenever I access a local TV stations news post and try to read it, I get the pop-up shown in the attachment. Why is it happening and what can I do to eliminate it?

I am getting this error in Firefox when I try to open certain webpages. These same links work in Google Chrome on the same device/connection.

Here's what I've tried:

In windows:

   Reset network settings
   Disabled firewall

In firefox:

   Cleared cache/cookies
   Turned off HTTPS-Only mode
   Turned DNS over HTTPS off
   Renaming cert9.db in profile folder to generate a new one
   Turned off all add-ons
   set network.http.http3.enable to false
   set security.tls.enable_0rtt_data to false

I've noticed that if I leave it on the tab, close firefox, then re-open it. It'll load in this one instance. However if I refresh/click anything on the website it then goes back to the error. I really can't figure out what the problem is

I am traveling and using my laptop. It is a modern laptop in good order with plenty of resources. I commonly use Youtube. However now it is saying problem loading secure connection failed when selecting Youtube. I know my internet connection is working fine. I can send a receive emails to my normal Gmail and Yahoo accounts. Please help.

Secure Connection Failed

An error occurred during a connection to twms.dc3n.navy.mil. The Certifying Authority for this certificate is not permitted to issue a certificate with this name.

Error code: SEC_ERROR_CERT_NOT_IN_NAME_SPACE

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Learn more…

Am unable to connect to onlinebanking.mynycb.com with Firefox but was able to connect with Microsoft Edge. Firefox msg. "Warning: Potential Security Risk Ahead" Seems like a bug in Firefox.

error message:

Firefox Can’t Open This Page

To protect your security, vimeo.com will not allow Firefox to display the page if another site has embedded it. To see this page, you need to open it in a new window.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites

I can't access my company website via Firefox for some reason. Very odd... This just started happening today. http://www.buckaroo.tv/

Error 530

Site is frozen

The page could not be loaded properly.

I am sure this is well known, but I could not find any reference to it.

Get this on various sites, but one it TUBITV.COM. One video file was ABOVE THE LAW and attempt to access gets a "Digital Rights Management (DRM) Error" (see atch).

Is this going to be fixed anytime soon? (Or is there something I need to do?)

Thank you.