Firefox Community Forum

Firefox is preventing me from going to certain websites because it is telling me I am using adblocker but I have none installed.. I am trying to play around with the settings but I still can't do it. Is there an inbuilt adblocker? I need help please...

I am experiencing an issue where Google.com (other google domains work fine) will not load in Firefox, resulting in an infinite loading loop. Other browsers on the same system (Brave) work fine.

Here are the steps I have already tried:

Reinstalled Firefox completely

Removed Firefox via sudo apt remove --purge firefox -y

Cleared all user profiles and caches: ~/.mozilla/firefox, ~/.cache/mozilla, ~/.config/Mozilla

Reinstalled via Flatpak

Tested network connectivity outside Firefox

curl google.com works correctly

DNS resolution works via getent hosts google.com in the host system

Checked proxy settings

Ensured “No proxy” is selected in Firefox → did not resolve the issue

Tested in Safe Mode (disabling extensions)

Problem persists, so not caused by extensions

Tried disabling IPv6 inside Firefox

network.dns.disableIPv6 set to true → no effect

Cleared DNS cache inside Firefox

about:networking#dns → clicked “Clear DNS Cache” → no effect

Disabled DNS-over-HTTPS (Secure DNS)

about:preferences#privacy → “Use secure DNS” → disabled → no effect

Disabled HTTP/3 (QUIC)

network.http.http3.enabled set to false → no effect

Verified Flatpak network permissions

flatpak info --show-permissions org.mozilla.firefox shows network access allowed

Inside the Flatpak shell:

flatpak run --command=sh org.mozilla.firefox getent hosts google.com

→ returns only IPv6 address: 2800:3f0:4001:839::200e google.com

I'm building a website from scratch and its going great. I just tried to implement a CSP and it worked except for one small section of my website that allows a user to upload an image and that image is supposed to be displayed back to the user. Anyways long story short the CSP blocked me so I tried to whitelist data: and it still didn't work. defeated I removed the CSP from Nginx to work on it later but when I went to try and test again I get this error. ``` Content-Security-Policy: The page’s settings blocked the loading of a resource (img-src) at data:image/webp;base64,UklGRqbeAABXRUJQV… because it violates the following directive: “default-src 'self'” ``` I have confirmed with Curl and by inspecting the network tab that there is no CSP included in the headers anymore. I have restarted Firefox, created a new Firefox profile, and cleared my cache to the end of time and yet still the error persists. I don't know where or how Firefox is storing website headers but they persists and also apparently work between profiles an implication I'm not going to delve into here. If someone could point me to the file where the headers are stored so I can delete it that would be wonderful.

specs Qubes OS 4.2 Mozilla Firefox 140.4.0esr

I hope I sent this to the right place.

PC is using Windows 11, latest updates. I have signed in to Mozilla Monitor many times in the last hour, but "Upgrade to Premium" does not appear in the upper-right corner as several help websites say it should. I cleared all cookies and turned Enhanced Tracking Protection off for the site, no help. I restarted Firefox - it's now at release 145.0.1 (64-bit), no help. Any other ideas? Thanx.

Meldung: Lassen Sie challenges.cloudflare.com zu, um fortzufahren. Image Siehe Bild Click auf Erlauben hat keine Auswirkung

I am getting the following message on a couple of different website pages today. "Please unblock challenges.cloudflare.com to proceed." I don't know what this means! What do I do to unblock/fix this, please?

Thanks, Paul

Bonjour en voulant aller sur un site connu et auxquels je vais j'ai eut ce message je n'ai rien modifié sur mon ordi d’où cela viens t-il et surtout comment y remédier. Merci "Pourquoi ce blocage ? Quelque chose dans le comportement du navigateur nous a intrigué.

Diverses possibilités:

   vous surfez et cliquez à une vitesse surhumaine
   quelque chose bloque le fonctionnement de javascript sur votre ordinateur
   un robot est sur le même réseau  que vous

Des difficultés pour accéder au site ?"

https://www.anthropiccopyrightsettlement.com/

Here is the site I desperately need to click around on. I can't access more than the homepage via Firefox (laptop), Safari (my laptop and iPhone) or Microsoft Edge (my husband's laptop). For the links on the page, I get an error message every time. And I have disarmed as many cautionary protections as possible. Yet other people seem to be able to use the site like a roller rink.

Ideas?

Thanks.

Madam or Sir,

I do not know what happens but since a few days I cannot access any more https://mathworld.wolfram.com/ which is crucial for my work.

Since I am blind, could you please help me.

I thank you in advance

Best regards

Claude F. Leibovici

When I try click to search on a word in Firefox on my iMac, which I've done productively for years, I'm now, without having changed anything about my settings. faced with

Hmm. We’re having trouble finding that site.

We can’t connect to the server at gb.search.yahoo.com.

How can I get rid of this?

Ubuntu 22.04.5 (kernel 5.15.0-153) Firefox updated from 142 to 143 automatically by snap.

In version 142 and older, html file with image source pointing to local (remote) network image file displays properly.

In version 143, this does not work anymore. I tried changing the image to point to a local computer file and it works.

In verion 143, If the link to the image is typed directly to the address tab in firefox, it works.

Perhaps some config setting need to be changed? Hope somebody can help.

Thanks in advance.

firefox network tab shows NS_ERROR_CONNECTION_REFUSED

I was having an odd issue the other day, that I now solved by comparing the settings on a working Firefox profile with mine.

For some reason, on one of my multiple Firefox profiles a list of web apps wasn't working. Among them were Discord, Miro Board, and Google Pay. I was suspecting that they all had the same issue, but didn't know what it was at that time.

The security settings were the obvious suspect (Ad-blockers, DNS, HTTPS enforcement etc.) because clearly something was being blocked, however nothing helped. The solution was in the Network settings. (See screenshot) I was using Manual proxy settings from the time I messed with I2P networks (or something similar).

I am not sure why having a proxy to localhost (127.0.0.1) on HTTP would somehow cause very specific major apps to stop working, while others keep working fine, but it happened to me anyway.

For anyone in a similar situation, with those particular apps not working, check your proxy settings.