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Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to nrega.nic.in because this website requires a secure connection.

What can you do about it?

nrega.nic.in 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.

Probably nothing, since it’s likely there’s a problem with the site itself.

I have sound in Windows, but YouTube is dead quit. I have tried all that is suggested in Firefox help and some YouTube sites. Nothing worked. I have tried off the computer and restarted, but no change. My system is Windows 11, sound works, and the latest Firefox update installed. Question is this a YouTube tacit to stop NoScript and uBlock?

Hi. I'm asking this question because I'm not quite sure how to describe this issue through a Google search. Recently, I've noticed that whenever I click and drag anything, an icon will pop up while I'm doing so. Attached is an example, I click-and-dragged on the "Learn More" hyperlink off to the right.

Is there any way to disable the icon that pops up? It bothers me and seems to slow things down, which isn't ideal. I'm not the most well-versed when it comes to Firefox's more advanced settings (the options in about:config and whatnot) so I wouldn't know where to start.

Today (06/12/2025) upon opening a new tab, Firefox slid the new option of uploading a custom picture to apply to the background. Tried the new feature, now I can not find the setting that allows me to change the picture. I read the thread "Customize your wallpapers". The instructions are as follows; You can personalize your Firefox New Tab page by adding one of the available wallpapers. Follow these steps:

  1. In the right corner of the New Tab page, click the gear IG settings icon.
  2. In the customization panel, under the Wallpapers section, you will see different categories like Solid colors, Abstract and Photographs.

       Click the category you prefer. For example, selecting Abstract will show a variety of abstract designs. 

The problem I have is the customization panel is no where to be seen, I have click on EVERYTHING possible, it is not in my settings, why? How do find this?

I've loved Firefox for years but can no longer use it because I have been unable to resolve this issue. All was well, an update was done, and bingo, I got this message. I don't know how to fix it. I removed Firefox from my desktop and re-installed. Same problem.

"The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem."

Firefox has shortcuts at the top of any new tab opened. These are usually your most visited pages. For most shortcuts, if you click the three dots you get a menu of: Pin Edit Open in a New Window Open in a New Private Window Dismiss Delete From History

This is the menu you get for almost all shortcuts EXCEPT for Amazon. For the Amazon shortcut you get: Pin Dismiss

That's it. No opportunity to edit it. And if you click on the shortcut, it doesn't take you to Amazon.com, instead it opens "Amazon.com Search" in the address bar. I don't want Search, I want to go to the Amazon home page but the shortcut doesn't take me to the Amazon homepage like it used to. Why is this broken now?

I found this file on my desktop. File type is Firefox HTML Document. Size 1KB. I've never noticed this before and wonder it I should delete it, move it, or what. Anything to worry about? I haven't opened it.

Thanks for any enlightenment you can offer!

Hi! i was wondering why my firefox reseted after reboot. i have all the important tabs and bookmarks for my university work, chores and articles, platforms that are mandetory on my uni. also, i was tinkering with partitions before the reboot because my steam didnt want to run any games. i was guided by the chat gpt with terminal coding to do get steam working even tho i didnt solve the problem. is there any way you can help me?

Hello,

I'm a bit out of ideas how I can get Firefox to display the correct characters. For reference: https://learnjapanese.moe/font/

Windows: I only have german and japanese locale installed, i even changed in intl.cpl the language to japanese. I have installed the japanese language pack / fonts and it's showing correctly in any windows editor.

Firefox: Second language set to japanese, disabled all addons, tried it on private mode to no success.

Any ideas how I get the characters to display?

Edit: I made it work by changing in about:config the font.cjk_pref_fallback_order-string to have ja as first.

I have 2 instances of Firefox: I use stable for all my professional work, and I use Developer Edition (Aurora Channel) for personal things. The stable branch works fine. In Aurora though, certain key combos will not work. This even persists in troubleshooting (safe) mode.

Specifically, it seems anything using both ctrl+alt will not register alt, only ctrl. alt, alt+shift, and ctrl+shift all seem to work fine, but ctrl+alt and ctrl+alt+shift do not. Again, this works fine in stable, so I am clueless as to why it doesn't work in my other instance.

Another detail is that this happens on multiple websites, not just one. The post prominent one is Google Sheets. In sheets, you can insert the date using `ctrl+;`, the time using `ctrl+shift+;`, and both using `ctrl+alt+shift+;`. Inserting them separately works fine, but both causes only one to insert.

After every update, Firefox starts to a blank screen and will not start loading the webpage url put in for over twenty minutes to a half hour. During this time other browsers on my Win 10 PC load immediately so it is not a network issue. It is Firefox. When I see that an update is pending I hesitate to do the update because I know I will lose the use of Firefox until it is ready to respond. It just hangs with "loading X.com" showing at the bottom left of the blank screen. I have been using Firefox for a long time and in the past year or longer it has become very unreliable. There are also instances where without an update it will do this and the only way I can get it to work is to clear the cache and the history through settings. What is going on with Firefox! (And lately there is an update every couple fo days!

Just started having ussue with Youtube on Firefox Mobile on an android phone. All I get is the OOPS grease-monkey page. Yet via the app or an actual desktop, Youtube loads fine. Curious if anyone else is having similar issue?

Dear Mozilla Support,

I am experiencing a serious issue with Firefox on my iPhone. The app activates normally, but after a few hours it becomes inactive on its own, and my browsing data is no longer saved. I believe this may be related to a security or phishing issue.

My cybersecurity services (including McAfee and Bitdefender) have notified me of potential phishing attempts, data access risks, and suspicious browser activity. I have reported these issues to my security providers, and they have opened case IDs to investigate further:

- McAfee Case ID: 03203372 - Bitdefender Reference: 1010231778

Due to these ongoing issues, I would like your team to check whether there’s any unauthorized activity linked to my Firefox account or app. I rely on Firefox daily and need this issue resolved as soon as possible for safe browsing.

If possible, I would also like to request that my Firefox browsing profile be locked or protected against unauthorized tampering, auto-deactivation, or interference by malicious software or attackers.

Please let me know what steps I should take, or if you need any further information from me.

Sincerely, Mod's note: PII removed

We're exploring adopting a default deny policy for Firefox extensions in our enterprise. However when I tested this by creating a custom policies.json Firefox unexpectedly removed all extensions for me, including the ones I thought I had allow listed. Here is my policies.json but just keeping in the Facebook Container add-on to illustrate:

{

   "policies": {
       "ExtensionSettings": {
           "*": {
               "blocked_install_message": "Only approved Firefox extensions can be installed, please email your request to itdept@example.org",
               "installation_mode": "blocked",
               "allowed_types": ["theme", "dictionary", "locale"]
           },
           "@contain-facebook.xpi": { "installation_mode": "allowed" }
       }
   }

}

What I would like is to to allow pre-approved extensions (including if they already are installed) and all other types of add-on, but remove and prohibit installation of unapproved extensions.

Can anyone assist, please?

Hello all, I have the same exact problem described in post https://support.mozilla.org/en-US/questions/1463436, dated 9 December 2024. Until ten days ago (more or less) all was working correctly. At the beginning I thought there was a problem with Intesa because Intesa had problems in all the country in that period, but I have now tried CHROME and found that is working correctly. My system uses Firefox 139.0.1, W10-32 and Iliad FTTH. I have already cleaned cache and data from settings but the problem remains. Any thought? Thanks very much for any help. Mario.

Tried to update Firefox. Got the message: your updates are being managed by your organization. I'm a home user. No organization. What is the problem? Thank you in advance.

I have been watching YouTube for years, issue free. This week I was blocked, as my computer may be blocking ads and thus violating You Tubes policy. How can I find and disable ad block programs/ extensions, thus allowing me to get back on You tube. I can recognize an outright program, but do not knew if extensions are in play that are not obvious to me. THANKS

Hi, I have a large number of tabs and also have pinned tabs. When I click a link outside of Firefox (FF is my default browser) it always opens them at the end of my tabs (on the far right). I would prefer that the newly opened links open at the beginning of my tabs (the far left) but just after my pinned tabs. Is there a was to do this?

Thanks!