Komunitné fórum Firefox

This morning I was able to access the website of: https://www.alexander-wallasch.de/ Now, ONE HOUR later I no longer can. You are doing this not for the first time, it happens regularly with websites that do not conform to what you would consider Mainstream! THis is not the sites fault. YOU ARE CENSORING ON PURPOSE: IF YOU WOULD NOT; YOU COULD SIMPLY ADD A BUTTON for every site THAT ALLOWS USERS TO OVERRIDE YOUR OPINIONS: WHY IS THAT NOT HAPPENBING? Why can the user not override your decision? Has anyone ever asked you for "help" like that?

I am running Firefox version 153.0.1 on a 64bit install of Windows 11.

A few days ago I had to factory reset my computer, including a clean Windows install. Since then, when attempting to access https://vodafone.cz/muj/prihlaseni, I get an Imperva Error 15 "Access Denied" error screen - screenshot attached here. Clicking the Imperva logo on the bottom of the error message leads to https://www.imperva.com/why-am-i-seeing-this-page/?src=23.

I was able to access the site in the past, most recently on July 8, 2026 - this would have been Firefox version 152.0.5.

This error persists in troubleshooting mode but not in private/anonymous (with or without extensions enabled), nor does it appear in Microsoft Edge or Firefox on Adroid.

Clearing cookies and cache did not help - in fact the error first showed up on a clean install of Firefox, when there weren't any cookies or cache stored yet. I've tried different DNS over HTTPS settings and listing the site as an exception in settings, but none of this made a difference. Enabling Firefox's built in VPN also made no difference, regardless of the selected location.

I found a recent post (https://support.mozilla.org/en-US/questions/1588627) describing a similar issue on a different website and tried the suggestion listed there to try a fresh profile - this seemed to work, but within a couple of minutes of browsing the error message returned. I've even reinstalled Firefox entirely, but this too did not help for long.

Interestingly enough, the error message lists a proxy IP address (not blacked out on the screenshot) despite the fact that I am not using a proxy.

The website provider's tech support claims this is an issue on the user side, not theirs - they have not been able to replicate the issue.

Is there anything I'm missing that would explain why this is happening?

Thanks!

As of about last Thursday, I have been unable to access my Isomedia.com SpamTitan01 account. I usually have a trove of spam messages, which I look at and delete, except for the one or two that are real emails. For the last 5 days My Titan vault is empty, though it is trying to retrieve data. My address is [redacted] @pioneernet.net Could it be that a Firefox update is preventing me from access?

Nancy Moore

Our team has already tried to fix the issue for a week now and none of the approaches seem to fix the issue. Does the Firefox dev department have any hints or clues for us?

Short description: Firefox network.lna.blocking blocks same-origin/loopback requests when the page is controlled by a Service Worker

Symptom: Login via OIDC fails in Firefox (the backend call after the IdP redirect is blocked). The error disappears if either network.lna.blocking=false is set or the Service Worker is disabled.

Environment: - Frontend (react) and backend run on the same machine (loopback/localhost)—no cross-network scenario. - Firefox with active network.lna.blocking (experimental Local Network Access feature, Chromium’s equivalent is Private Network Access).

Root Cause (Analysis): 1. apps/react/sw.js registers a global fetch listener via Workbox and calls workbox.core.clientsClaim(). This causes every open page to be immediately controlled by the Service Worker. 2. registerServiceWorker() is called unconditionally on every app start, regardless of authentication state—even on the login/OIDC page. 3. The app uses hash-routing (URL fragments like “#/oidc”); the login page and the rest of the app share the same document URL, so you can’t restrict the SW scope to “everything except login.” 4. Once a page is Service-Worker-controlled, every fetch—including requests not explicitly handled by Workbox routes—first goes through the SW’s fetch event (default behavior when any fetch listener is registered) before proceeding to the network if it isn’t intercepted. 5. Hypothesis: Firefox’s LNA implementation doesn’t correctly inherit the address-space classification (loopback/private/public) for SW-forwarded requests across the controlling client. A direct document fetch (loopback→loopback) is allowed, but an identical target fetch routed through the SW is blocked.

Reproduction (minimal): 1. Use Firefox with network.lna.blocking=true (the default in affected versions). 2. Load a page that registers a Service Worker with a fetch-event listener (e.g. via Workbox precacheAndRoute + clientsClaim()). 3. Ensure both the page and the target resource are served from localhost/loopback. 4. From the SW-controlled page, call fetch() against the loopback target resource → the request is blocked. 5. By comparison, the same fetch from a non-SW-controlled page succeeds. 6. Setting network.lna.blocking=false also allows the fetch to succeed under SW control.

Excluded Causes: - Different address spaces for frontend/backend (both are on the same loopback machine)—ruled out. - Misclassification due to redirect_uri or cross-origin navigation—the OIDC redirect is a top-level navigation (unaffected); only the subsequent backend call (token exchange/session validation in SsoLogin.tsx → ssoLoginSubmit) fails.

Heyo! So, I've had this ongoing issue with Firefox for quite some time around trying to access the Newgrounds website, but failing to do so. I have tried several things such as disabling the enhanced tracking setting, disabling DNS over HTTPS, forcing cookies and third-party popups to be allowed but that does not work what so ever and disabling enhanced tracking is greyed out so it's not even clickable to toggle off.

One thing that did work was to use the built-in VPN, but I really don't want to constantly have to use a VPN to browse one singular site every time I want to access it. So now for the question. Has anyone else experienced this? And if you have, how did you solve it if at all?

Firefox is my browser but unable to access email page, "Access denied. You don't have permission to access .... on this server". Internet operating ok otherwise. Also, I have an old Windows 7 laptop which works fine - emails available and open ok.

Amazon Facebook Ebay National Lottery and others just refuse to load.I tried troubleshooting mode,it worked once and now it doesn't.I believe I'm not the only one with this prob. Help? Thanks.

I access Bluesky (bsky.app) for business on my PC. Since the last update, I've been unable to access Bluesky from my regular Firefox browser. I can using other browsers, the mobile app, and, oddly, in Firefox private browsing. I've cleared my browser history, cookies, etc. I restarted the computer. I logged out of Bluesky (and now can't log back on the regular PC account because it claims I'm not connected to the internet). Yet, I had no trouble logging in using private browsing.

I've looked through settings, etc. and can't figure out what could be limiting my ability to access this website.

別のノートパソコンやスマフォではアクセスできるがデスクトップパソコンだけで　https://www.minim.jp/　アクセスできない。他の多くのサイトにはアクセスできる。

今まで利用していたChromeでもEdgeでも10日前にアクセスできなくなったので、試しにFirefoxをインストール、その後、このサイトにアクセスできた。それでhttps://www.minim.jp/に接続するときだけ、Firefoxを利用していた。

しかし、28日アクセスすると「エラーコード: PR_END_OF_FILE_ERROR」が出るようになりアクセスできなくなった。 現在もChromeやEdgeではアクセスできない。

問題箇所が不明で改善方法が分かりません。 問題箇所、改善方法をご教示ください。

Windows11　Firefox　146　です。 ウイルスバスターの問題かもしれないと思ってアンインストールして、確かめたが改善されなかった。 ChromeやEdgeの公式版のβ版(最新バージョン)でも改善しませんでした。 OS　25H2　26200.7462で最新版