I-Firefox Community Forum

I would like to understand how DNS over HTTPS impacts browsing speed and privacy in Firefox.

Details: Hello everyone,

I am currently exploring Firefox privacy and network settings, especially DNS over HTTPS (DoH). I noticed that enabling this feature slightly changes website loading behavior on some networks.

I would like to ask:

Does DNS over HTTPS introduce additional latency? Are there performance differences between providers? Can corporate or public Wi-Fi networks interfere with DoH requests? Is there a recommended configuration for balancing privacy and performance?

I’m interested in both technical explanations and real-world experiences from Firefox users.

Thank you.

I am trying to log into the indian evisa (indianvisaonline.gov.in) website to print off an ETA (Electronic Travel Authorisation) and when logging into the site I am getting a warning saying potential security risk ahead

Warning: Potential Security Risk Ahead

Firefox detected a potential security threat and did not continue to indianvisaonline.gov.in. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details.

What can you do about it?

The issue is most likely with the web site, and there is nothing you can do to resolve it.

If you are on a corporate network or using antivirus software, you can reach out to the support teams for assistance. You can also notify the web site’s administrator about the problem.

I do not know what to do for the best

I'm running the latest version of Firefox on Win 11 64 bit.

In looking through settings, I noticed that DNS over HTTPS, which is set to the Cloudflare default, is inactive and giving the error (NS_ERROR_NET_INTERRUPT). Using NextDNS is fine.

The problem is not unique to FF, as another Chrome-based browser has the same problem, and I have switched that to OpenDNS.

I have been through all the possible causes and diagnostics for Cloudflare not working (firewall, running FF in safe mode etc.) but can't see anything.

However, I did download the Cloudflare desktop application, and when this is running in background, the Cloudflare DNS/HTTPS settings work perfectly in both FF and the other browser.

Whilst I can of course keep using the other DNS providers, I'd prefer Cloudflare, but I don't really want to have yet another app running and consuming resources, which would be the case with Cloudflare.

If anyone has any suggestions for why Cloudflare isn't working, or how to fix it, I'd welcome them. I have searched high and low for more information, both here and elsewhere, but if such exists, I haven't found it.

Until I installed the latest update (136.0.1) I could open Firefox and navigate, never having to log into PW manager until I came to a site where I had to log in and use a saved PW. I have many sites where my login is remembered, and I don't have to log in, so this isn't needed most of the time.

Now EVERY time I open Firefox that request for my primary PW pops up and I have to hit CANCEL twice to clear it before I can to anything. It's an annoying pain in the tush.

How do I turn this off, or set it so that that pops up ONLY when I have to log into a site?

Latest update of Win 10 3/15/25

Thanks.

Secure Connection Failed

An error occurred during a connection to chatgpt.com. Cannot communicate securely with peer: no common encryption algorithm(s).

Error code: SSL_ERROR_NO_CYPHER_OVERLAP

   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… this is what it says when i try to access

so each time i set my network to manual proxy configuration, the browser wont load searches and still can't intercept request on burp suite. i have imported the certificate,and added foxy proxy add-on . Note that i was able to do all of this few months ago and it suddenly stopped working. i was seeing a message that says invalid peer certificate signature

when i typing the address ofsite for connected to site of Iran goverment show a massage that your conection is not protect .what cause for send this massage .

I notice with latest firefox updates the https:// is missing from the URL line. When I login to secure sites (ie banking), no https://. I've toggle and play with the http and dns settings. Is this a new feature or should i start changing my passwords? Thanks.

I'm used to check certs with right click on icon beside the address. Also for own servers in my local LAN I need this. I know there is Let's Encrypt. But sometimes it's more easy to just have a self signed cert and verify it myself. Also I want to see, who signed a cert from www.snakeoil.com/insert_your_credetials.

Please help.

rundekugel

Hello to all,

I wanted to use DoH (dnsforge.de) under “maximum protection”, but with one exception: I would like Ecosia.org to be able to place ads for me, because I am convinced of Ecosia and want to support this project. Tested this with Cloudflare as well, setting up an exception here does not work either.

Now the exception set in Firefox has no effect. It should not be due to the DNS provider, because Ecosia.org is not blocked and has even been whitelisted.

What is the expected behavior of the “maximum protection” setting?

Kind regards

Using FF 140.10.1 esr on a windows pc I noticed (probably long after the fact and numerous updates) that there's no longer https:// in the address bar. Having some recent issues with security made me look for this.

When I switched to Edge, the https:// was in the adddresses I was using. There is a lock symbol, but the locks seem to change in their appearance from one browser or website to the next.

Was this verification sign removed and, if so, why?  

Thank you.

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

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.

Hi, I'm using a policie file to force a family-dns. Ive written the current code down below. Unfortunately this leaves the "manage exeption"-button open, where its possible to simply bypass the block for a specific site. Is there a way to lock this button in the policie file? Thank you very much. {

 "policies": {
   "DNSOverHTTPS": {
     "Enabled": true,
     "Locked": true,
     "ProviderURL": "https://doh16.jusprogdns.com/dns-query"
   },
   "Preferences": {
     "network.trr.mode": {
       "Value": 3,
       "Status": "locked"
     }
   }
 }

}