Forum der Gemeinschaft Firefox

I routinely am not able to open registration to conferences or other links to long web addresses. This screen message from Firefox appears:

"Server Not Found

Firefox can’t connect to the server at gi9zc6sab.cc.rs6.net. What can you do about it?

   Check to make sure you’ve typed the website address correctly and try again in a few moments.
   Check your network connection.
   Check that Firefox has permission to access the web (you might be connected but behind a firewall).

That message appeared for this https://gi9zc6sab.cc.rs6.net/tn.jsp?f=001T5esaGIPGizJmjnFH_ZN0rs2nRmFvfg68IUb5lZCQmIAPWdC8rFl0Y1xbniCS0F-q4zVJMAgN3whbcuThS0wDfZevAHUBUCIbKas_wNb6IUJRAHRhiCDsq5_kmYDK-Gwv2w6vv76FnR39uAtOCKdr_ttlxoNJN7WIwMD4ZlQBENHQ920CL4dvvDmhESGhC9TSU-FvwD5zS2y1m0fjSgUiuFw0HzjsTjKMljdebV-fUXu5pxZFF4nQqJ156RWpzEzobANY217MXdmMlwqBqX_1EoztmWAB2LfNJz-Z-9ZVVejG_saHWKFvdbZ2BrQlX4Y1fpYrTz5Xzx8AvB4ybvXJA==&c=yp6c6A5fB7yDTLMvkly_lvoPm2JVn0awZB8o-xRVaJpx_MPafsrX3A==&ch=c_dP5vdY4uwNFMGk8OzrTttJtbNgGv0RSdMckxp2d-NbUWrheIutEQ==

That long link was embedded in this conference announcement:

Join the Connecticut Institute for Resilience and Climate Adaptation

for our annual summit at the

UConn School of Law, Hartford, CT

Friday, November 20, 2026

9:15 am – 2:30 pm

Agenda

8:45-9:15: Registration and Coffee

9:15–9:25: Welcome Remarks

9:25–9:50: CIRCA Update Presentation

9:50-10:35: Legislative Implementation Presentations

o 9:50–10:00: Resilience Improvement Districts

o 10:00–10:10: Stormwater Authorities

o 10:10–10:20: Climate Change and Coastal Resilience Reserve Funds o 10:20–10:35: Question and Answers

10:35–10:45 Break

10:45–11:00: Keynote Address

11:00–12:00: Legislative Panel

12:00–1:00: Lunch

1:00–2:10: Resilience on the Ground and In the Water Panel

2:10–2:30: Networking

Since space is limited, registration will close on November 10, 2026.

Please join us to work toward a more Resilient Connecticut!

EVENT WEBSITE

For more information and

In the Settings, the "HTTPS-Only" feature seems broken. There is an option to 'Don't enable" this feature, but that doesn't make any difference. I can get to an "http:" site using any other browser, but not with the latest Firefox.

Какое то время назад, я уже писал, что перестал работать VPN в браузере Mozilla. После этого, через короткое время, VPN включили! Сейчас, снова, VPN перестал подключаться и работать. Когда же будет стабильность, в работе этого VPN? Включите, пожалуйста!

Ive been FIGHTING to get business done on ROKU website. IT continues to switch to SPANISH. I am in the USA. I no longer am subscribed to ROKU in SPANISsince several months past. I figure a BLOCK for other languages would do the trick.IS there such a thing. THERE SHOULD BE!!! Thanks

System: Linux Mint 22.3 Xfce Firefox web-browser: mint-001 - 1.0 _ 155.0.1 (64-bit) Hardware: Both on my Desktop and Laptop computers.

Since the recent updates, 1-2 weeks, every time I try to enter a character via Unicode insertion, CTRL+ALT+U, the character does not insert but a row break. I made a video about it: https://youtu.be/OP9UCGpZdEc

This happens in every website I use; mostly likely on every website.

Is there anything I can do now?

Thank you for your time reading this. 🙇

Hello Mozilla Community,

We are experiencing an issue where our legal services web portal (hdclaims.co.uk) fails to load properly specifically for users on the latest version of Firefox on desktop.

Problem / Issue:

Users report receiving a SEC_ERROR_UNKNOWN_ISSUER error when attempting to access our online claims form.

The issue does not occur in Chromium-based browsers, but Firefox blocks the websocket connection required for live chat support.

Environment Details:

Browser: Firefox Desktop (Latest Version)

Website: hdclaims.co.uk

Server Setup: Nginx reverse proxy with LetsEncrypt / Cloudflare SSL certificate.

Steps Taken:

Verified intermediate CA certificates are properly chained on the origin server.

Tested with a fresh Firefox profile (no extensions enabled), but the security warning persists intermittent for UK users.

Checked SSL Labs report, which confirms an A+ grade.

Is there a specific cipher suite requirement or OCSP stapling configuration in Firefox that could cause this intermittent SSL handshake failure on .co.uk domains?

Any insights from the community would be appreciated!

I am on version 155 of the browser, and the sidebar is not showing up for me. Clicking the sidebar toggle button also does nothing. I've tried going into settings and toggling the show sidebar option, but that also doesn't do anything, as if the sidebar feature doesn't exist. Toggling vertical tabs just makes the tab bar disappear, and I've tried both the options menu and right-clicking the side bar toggle button. Is there an error, or am I missing something?

I don't know if the F/F updates are legit; I used to get updates, once in while.Lately seems updates are every few days or everyday.Not sure if these are spam or getting hacked?

I've always used Firefox as my default browser, it's been updated and is the current version. Recently I have noticed that pages are slow loading and some images on the page never load properly and remain blank. More vexing, is that Gmail has become very unstable in Firefox and won't load properly, loads slowly and freezes blanks out when I try to delete trash or spam, etc. It's annoying as more and more I have to open up Edge Browser to get performance on the websites that are failing in Firefox. This includes various websites that I use for work where logins are glitchy and unstable in Firefox, but work in Edge? Disappointing as I prefer to use Firefox, but even with recent upgrades installed it seems to work less well than in the past.