Firefox Community Forum

When attempting to load additional screen connected to my bank it does not work as intended. We trouble shot: we disabled Auto fill and PopUps. What other steps should I take?

I edit a newsletter substack and sometimes I have links embedded in it. Mozilla denies me access to those links when I check the newsletter. Do I have to cancell Mozilla protection to have full access to the links in my newsletter from substack?

Hi everyone,

I'm having trouble accessing my local network devices (a 3D printer and Raspberry Pi) using short hostnames like "http://impressora3d" or "http://impressora3d/". Firefox keeps blocking the connection with the "Looks like there’s a problem with this site" error page.

I've captured a network log using 'about:networking' and I can see that: 1. DNS resolution works perfectly and points to my local IP:

  "CompleteLookup: impressora3d has 192.168.1.10"

2. Firefox is upgrading the request to HTTPS (port 443) automatically:

  "nsSocketTransport::ResolveHost [...] impressora3d:443" -> "pushing io layer [0:ssl]"

3. The device rejects it because it only listens on HTTP (port 80):

  "Bad Socket 804b000d" (NS_ERROR_CONNECTION_REFUSED)

What I have already tried: - Disabled "HTTPS-Only Mode" entirely in settings. - Checked "Secure DNS" (DoH) settings (set to Increased Protection and added exceptions). - Cleared history and used "Forget about this site" on the hostname. - Typed "http://" explicitly.

Firefox still refuses to connect via plain HTTP (port 80). Is there any hidden 'about:config' preference or HSTS cache forcing this behavior for local unformatted domains?

Thank you!

Something is wrong with your network configuration We checked your network configuration and found that the following domains are not accessible.

   hls-c.udemycdn.com

This may prevent you from viewing videos or significantly degrade video performance on Udemy. If you use an ad blocker, please check the ad blocker settings page, whitelist the domains above, and refresh this page to recheck your network configuration. If the problem remains or you are not using an ad blocker, please check your system network configuration or reach out to your IT team and ask them to whitelist these domains.

Today (4/27/2026) I am suddenly unable to log in to My Account on various websites (eMail, grocery store...) The business page opens but when I try to go to the account login page, I either get a blank page or the page spins and spins and never goes to the login page. I am able to get to the logins on Safari. I've cleared cache and cookies, and closed out of Firefox and reopened.

.

After update, I am denied access to my Xfinity email account: You don't have permission to access "http://login.xfinity.com/login" on this server.

websites are being blocked when I click on links from my email account and I don't know why but I also want it stopped the websites are Stage32.com and https://course.fp-platform.online/learn/hRpTYcFi2UyZKzLm2gaOHg/theory

I am a business owner and I need to log into united health care provider portal. Mozilla will not allow me to access. I'm using this link: https://secure.uhcprovider.com/ and Mozilla will not allow me to go further. This is causing work stoppage. Chat GPT says the link is secure. HELP! I need access so I can get paid.

From Chat GTP:

https://secure.uhcprovider.com/ I checked that exact URL, and here’s the key point:

👉 secure.uhcprovider.com is actually configured with HTTPS and a valid SSL certificate—so under normal conditions, your browser should show it as secure.

So if your browser is blocking it or labeling it “not secure,” the problem is almost certainly local (your device/network) rather than a new issue with UHC.

This browser is not letting me connect with my pension website. It allows me to sign in, but the pages with my account are not showing up. How do I get it to recognize the website as safe?

I tried to go to Macys.com and got the following message:

Access Denied You don't have permission to access "http://www.macys.com/?" on this server.

Reference #18.6824c317.1773777776.8ce30f09

https://errors.edgesuite.net/18.6824c317.1773777776.8ce30f09

Please help as I haven't had this problem before to shop at Macys online. Thank you.

Dear all,

for two days (as of march 21) any search request is denied, no results are despayed. Instead a message window pops up: "Error: Routing error", the requested website (here: duckduckgo.com) would send the request into an endless loop. This problem only occurs using the mac-version of FF 148.02. The moblile version runs as normal, and another browser, Safari, works as he should.

I tested all my add-ins (switching off and on), private mode produces the same result. So, could you give a hint, is it (my) single, private issue?

Thanks a lot, this cuts me off the internet at large.

Hello,

When I try to visit a specific journal site that requires authentication, the browser automatically redirects me to an authentication page that I have used before. This is very annoying because every time I click a link to the journal, I’m sent to the other portal and can’t access the article. I want to stress that I haven’t installed any add‑on that would cause this redirection. I think I did that myself manually but I have no idea how. I’ve already deleted the cookies for both sites, but nothing has changed. I hope that makes sense, it’s a bit difficult to explain.

I'm using firefox 147.0, on mac Tahoe 26.2.

Thanks for the help !

I waited for a long time to do an upgrade to avoid problems. Today finally I decided to upgrade to the latest version of Firefox for my iMac, 147.0.1. Before the upgrade I successfully used with zero issues gemini.google.com/app . Now the website comes up, but regardless what I enter as a question I only get an error message stating "something went wrong". The same website works with no issues (TG) with Safari.

Does anyone else experience the same? Is this a known bug with this version of Firefox? Is there a work around for it? Is the solution just using Safari?