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Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to www.nextechclassifieds.com because this website requires a secure connection. www.nextechclassifieds.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site. www.nextechclassifieds.com uses an invalid security certificate.

The certificate is not trusted because it is self-signed.
Error code: MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT

This is a trusted website, been using it for years without issue. Used it a few hours ago to check my account. Only problem is on my pc, all other devices including people I've asked, do not have this issue. Seems to be a problem with the firefox browser only.

WebGL has stopped working. I think this has happened with Firefox 91.

For example, http://webglsamples.org/aquarium/aquarium.html gives the error Status: WebGL creation failed: * tryNativeGL () * Exhausted GL driver options. (FEATURE_FAILURE_WEBGL_EXHAUSTED_DRIVERS)

I'm running Firefox on Debian on ChromeOS.

On about:support, WebGL 1 Driver Renderer: Red Hat -- virgl WebGL 2 Driver Rendered: Red Hat -- virgl

There are no WebGL errors in about:support

I've tried the Troubleshoot Mode but that made no difference.

I have used/accessed Google Maps for years - so many I can't remember and now today I get this message

We are sorry, but you do not have access to Google Maps. Please contact your Organization Administrator for access.

Is this a FireFox muck up or what?

Hi, I faced the problem with Youtube recommendations on a video page. When I watch a video I can't see recommendations, comments and video title (see the image). In console i get an error: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://googleads.g.doubleclick.net/pagead/id. (Reason: CORS request did not succeed).

I am on arch linux system.

I've tried to: 1. Update all ca-certificate* packages 2. Disable and delete ad-block 3. Use another browser (there is no problem, only in firefox)

This problem is only actual on Youtube for me.

I need to use Google Meet for a professional purpose. When I use is from the Chrome browser, I can present a specific tab on my desktop; however, I prefer to use Firefox as my default Browser. The problem is, when I use Meet on Firefox, the presentation options don't include sharing a tab. Is there a way to fix this, or do I just need to use Chrome when meeting?

Thank you.

I am trying to get Netflix to play on my new Macbook Air (M1). Not working. A little sleuthing led me to check about:addons, where I see this message "OpenH264 Video Codec provided by Cisco Systems, Inc. will be installed shortly." However, the installation is not happening. Help!

Hi! This will sound like an odd question, given that everybody seems to search for the opposite - but how could I DISABLE dark-mode in FF95.00?

I have my whole OS in dark-mode the whole time because of looks. I also installed a dark-mode theme on FF. Because of looks. But after the latest updates, FF decided to present a bunch of my favourite websites in dark-mode, too. Even at daytime - where I use my Computer.

Affected websites are, for example such "unknown" websites like "twitter.com", "spiegel.de" or even "facebook.com". It seems like they use some kind of a flag or token, which decides to use darkmode or not. How do I re-enable the light-mode (is this even a word?), not dependent of my windows / FF settings? Is there an add-on?

Suddenly on my Wordpress website all the embedded google maps on posts are showing "maps.google.com will not allow Firefox to display the page if another site has embedded it". They've worked for months. Won't display on Firefox or Firefox Android. I can't even edit the maps in WP (Elementor widget) - shows the same banner.  ?

I occasionally visited this site https://referti-empoli.uslcentro.toscana.it/portalepaziente_user/user-login (it's a site managed by the local health authorities). I am reported that a safe connection cannot be established with the message PR_END_OF_FILE_ERROR. I am not shown any option to consider this site SAFE (no matter what, it's SAFE and I need to access it occasionally). I also use ESET anti-virus software. I can access through other browser, at least the show me it couldn't be safe but allow me to go on. I don't want to switch browser once in a while to navigate. I want to use Firefox in any case (or switch to another one that allows me to). How can I make it work (apart from deleting cache, temp files and history, which did not work)? Thank you.

Spectrum.net has changed their login page as of March 17, 2021. I am unable to login under Firefox and get Spectrum error 'IDID-1060'. I tried Edge and Chrome browsers with no problems. I contacted Spectrum and they say it's a Firefox issue. I've tried removing extensions, clearing caches, starting in Firefox 'safe mode', disable VPN but nothing works! I would prefer NOT to reset Firefox as I don't want to lose my changes. I'm on version Firefox 86.0.1 and Windows 10 20H2. Does anyone else have this problem or can suggest other troubleshooting ideas?

I am getting a certification issue when trying to visit 2 specific sites which are some of the most visited sites in the web: https://www.google.com and https://www.youtube.com

The error it shows when trying to visit these 2 pages, is SEC_ERROR_UNKNOWN_ISSUER.

I have tried to troubleshoot it and follow the solutions recommended at: https://support.mozilla.org/en-US/kb/error-codes-secure-websites#w_the-error-occurs-on-multiple-secure-sites

however none of the solutions described in this guide worked to solve my problem.

In that guide, one of the suggested solutions is to scan my system for any malware. I used the following: Windows Defender Maleware Bytes AntiMalware Karpersky TDSSkiller however the results are all clean.

In the guide, it suggested that I check the clock as well. The system clock however is synchronized.

Last, I have resetted Firefox Profile but this didnt fix the issue either.

I shall note that the issue appeared yesterday and so far nothing helped fixing it. Not even the system restarts.

The issue about visiting these two sites, is limited only to Firefox.

I can access https://www.google.com and https://www.youtube.com without problems using Google Chrome and the Opera Browser.

Also, Google Mail and Google Translate work fine on Firefox. These two sites can be accessed with Firefox without causing any SEC_ERROR_UNKNOWN_ISSUER errors.

I have a new business website http://affordable-tutors.com/about-our-tutors and I tried to put in my video https://youtu.be/EQxd_cowXPg

but it gives me the following error. Website will not allow Firefox to display the page if another site has embedded it

What can I do?

Yes, I own all the rights for that video.

I've used Firefox forever, however in the last couple weeks, I can no longer use eBay as the webiste looks weird and my account is inaccessible. (See attachment.)

I've cleared all history/caches/etc. per forum suggestions. No change. So now to use eBay, I have to switch to Safari or Chrome (which I rarely use.)

Using new 2020 Macbook Pro and latest Firefox 80.0 update. Any suggestions would be greatly appreciated!

-G

All the other apps in Office 365 work as normal but when I launch Sharepoint in a normal Firefox window I get the following error message:

• Sorry, something went wrong
• An error has occurred on the server.
• Technical Details
• Troubleshoot issues with Microsoft SharePoint Foundation.
• Correlation ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxx
• Date and Time: xxxxxxxxxxxxxxxxx

Firefox is up to date (v81.0) and running on a modern up to date Win 10 Pro laptop, I've cleared all my browser history and rebooted but without success. The same web page works without problem in Edge and Chrome but in Firefox it will only work in a private window.

Starting as of today (Oct 13), the FACEBOOK screen suddenly moves when I am typing a comment. Whenever I hit SHIFT+alpha_letter at the beginning of a line OR simply hit the backspace key, the screen suddenly shifts about a page up, closer to top. This shifts the entry area where I'm typing down and off the screen. Just hitting the backspace to correct a typo causes the screen to scroll on its own. I have to scroll back down to the entry box and if I make another typo, it happens again. It is maddening!

I've restarted in troubleshoot mode and the same thing happens, so it is not an add-on. This is happening on both my Firefox Linux systems AND on a Windows 10 machine, so I don't think it is specifically OS related either. The screen however does stay put, like it is supposed to, using Chrome or Opera.

Is this a Firefox problem or is FACEBOOK messing with Firefox?

Every time I restart my pc and load google it asks me to 'agree' to their terms. It does not remember that I have done this and forgets the options I chose. It is just annoying having to click on it each time. I found an article online but it must have been applicable to an earlier version as when I go to Options > Privacy > History section there is no longer a button on the right "Exceptions..". I am using version 81.0.1 (64 bit). Any help appreciated. Thanks

I have a website with custom font that is stored locally on server, and is defined in CSS file: @font-face {

   font-family: 'quicksandlight';
   src:  url('/static/fonts/Quicksand-VariableFont_wght.ttf') format('truetype'),
         url('/static/fonts/quicksand-variablefont_wght-webfont.woff2') format('woff2'),
         url('/static/fonts/quicksand-variablefont_wght-webfont.woff') format('woff');
   font-weight: normal;
   font-style: normal;

} Chrome is showing all letters in this font, and Edge and Firefox are showing most letters correct, but not B, D, T, P, R and X. What I know is that this is only happening on words that have "font-weight: bold" or "font_weight: 600", when it's set "font-weight: 400" all letters are renderd correctly. This is bugging me af, and if somebody can help to fix this, without need to change to lower font-weight, I would appreciate it.