Firefox Community Forum

THE ABOVE ERROR MESSAGE HAS PREVENTED ME FROM ACCESSING 3 WEBSITES - PaddyPower, Ladbrokes, & UK National Lottery. None of the suggested remedies has had any effect. Can you fix it?

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

Hi I just wondering that if the developer of Firefox can make or improve more about personality and security online I hope they can make The possibility to encrypt browser with browser more like you are of another browser to encrypt into one

I think there is a potential security threat and did not continue to www.google.com Please help me to resolve the problem.

Isaac

Hello if i enter proxy and ip address in firefox in Manual proxy configuration section then when i open a website its asks for username and password my question is can proxy owner see my data and i am using https websites like post data ?

passport.moi.gov.af has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.

The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem.

My broadband router set ip address is not secure as it's HTTP What is the solution to able me to access my home router via Wifi in the same location of course which is at home?

I am trying to login to email service tuta.com. Due to malicious actors, the site is being blocked by Firefox when it should NOT be. Malicious actors have made false reports to create a DDOS on Tuta. When I try to connect to the site I get this message: "Did Not Connect: Potential Security Issue"

How do I tell Firefox to stop blocking this site as there is NOT a security issue.

Around 12/28/2024 my LastPass Password Manager extension dropped off my Firefox. When I tried to reinstall nothing happens except the flashing dots, which just go on. The LassPass extension does work on my Chrome browser (only used as a backup, Firefox using Duckduckgo rules)

Steps I have taken. Relaunched firefox. Rebooted laptop Deleted all Lastpass cookies. Did a firefox refresh. Tried to install older version of lastpass, they download but won't let me add.

Please Help? Thanks

Several of my financial accounts give me this error with Firefox. I had to go to Edge to get my tax documents. I'd much rather have a way to get to my sites without leaving Firefox.

HSTS required

Other websites may require HTTP Strict Transport Security (HSTS) and will not allow access with an insecure connection.

Open my desktop and NordVPN starts up. The Firefox extension frequently shows I an not connected via the VPN whilst Nord says I am. I have in the past clicked on the extension to connect the VPN and this has worked but recently I just get an error. Same thing occurs with NordPass.

when managing an extension, you describe all the things it can do such as read anything on your computer. But you never say what the consequences might be, such as stealing or selling your info. Why don't you tell the reader what the consequences might be?