Firefox Support Forum

Did Not Connect: Potential Security Issue

Firefox detected a potential security threat and did not continue to www.google.com because this website requires a secure connection.

What can you do about it?

www.google.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.

The issue is most likely with the website, and there is nothing you can do to resolve it.

If you are on a corporate network or using anti-virus software, you can reach out to the support teams for assistance. You can also notify the website’s administrator about the problem.

When clicking advanced button there is no way to proceed:

Someone could be trying to impersonate the site and you should not continue.

Websites prove their identity via certificates. Firefox does not trust www.google.com because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates.

Error code: SEC_ERROR_UNKNOWN_ISSUER

View Certificate

I have been using firefox on ubuntu 22 for more than a month and everything was working fine untill 4 days earlier when i first got error relating to security certificate issue and data hijacking. But i have been using same sites earlier too without any issue. Also those sites are just articles on site without any personal information. From last 2 days i am also getting redirecting issues. First site to redirect to during google search is bestbonusprize.life then if i disable adblocker it just keep redirecting. I don't have any issue accessing same site in google chrome. I just have firefox installed till 4 days earlier, but when i start getting issues i installed chrome to test if i am getting same issue but all work good in chrome. One of the main change from earlier is i was in different location using different wifi provider. It could be one of the issue but i am not sure as other people using same wifi don't have much issues. Plus things work fine in chrome. I tried using anti-malware but malwarebyte is only available for window and i don't know any thing about anti-virus and malware removal for ubuntu as never needed it. Please guide me for securing my firefox browser. Regards.

Hello Community.

I've selected an option to open PDF's in Firefox for preview. And if I wanted to download the PDF after preview, I simply clicked the downloab button from the preview app/tab. The files were downloaded with default filename and to the downloads folder without prompts. But since a while ago the dialog where the save location must be selected and filename given for the file opens up after the click of the download button.

How can I change it back to the previous behaviour without having to input filename and select the file download directory?

I am unable to browse to onedrive.live.com or onedrive.com in Firefox. Works in all other browsers on my machine (Windows 10 - works in Chrome, Edge, Vivaldi, Opera) but just shows a blank page in Firefox.

I've tried in various locations, so it's not my connection. I am running the latest version of Firefox (102.0 64 bit)

I've been using firefox for so long, but now I'm having an issues where I'm not able to download anything. Whenever I click on either download or upload buttons, no window popups. I tried Brave browser with same, but it crashes. This problem started on Firefox. Helps would be appreciated. (Sorry due to same issue I can't upload screenshot/video sample of the problem).

M1 Mac, Macos 12.4

After installing Firefox 102.0 neither of my computers will open Reddit pages. As far as I can tell, all other sites appear to work normally and Reddit functioned before the Firefox update. I restarted Firefox, restarted my computers, deleted Firefox and Reddit history and cache ... nothing so far has solved the problem. Reddit works as expected in Safari.

Any and all suggestions will be appreciated!

Tried uninstall, update, troubleshoot mode, restart, clear cache, malware detect, task mgr, etc. Windows 10 software, drivers, firewall, hardware, memory, etc are ok.

Firefox hangs, no rhyme or reason, random pages, every hour or so.

Am I the only one having issue?

In making this post I am following instructions found at https://support.mozilla.org/en-US/kb/troubleshoot-firefox-crashes-closing-or-quitting, which include the statement "Fill out the Details section of the next page..." which seems to refer to THIS page, but I see no Details section here, so I'll just put the details where they seem to apply.

Firefox Version 102, installed today, shows the same symptom I've been seeing for several weeks, perhaps months: whenever Firefox is closed, a crash report popup appears on the screen (after a minute or two). I've been submitting these on a regular basis and hoped that Version 102 would contain a fix, but the issue continues.

So today I've created some minimum-to-reproduce examples, in each case using the same setup, but closing Firefox in a different manner:

Setup: Firefox for Windows V 102 installed today. Windows 10 is up to date. I open Firefox in troubleshooting mode, which displays my home page, located on a shared server that I use for a website and other stuff I want to be able to access from anywhere. Nothing exotic, just a list of links. That works.

Then, without doing anything else (for purposes of these tests), I close Firefox via one of the following (with associated report ID):

• Click on large X in the upper right corner of the window.

   bp-e31ef7d6-8d17-41c8-a204-0e53c0220630e

• In the window menu, select File > Exit.

  bp-d15f97c8-267f-4550-9d42-69eb70220630

• On the task bar, RMB on Firefox, then select 'Close window'.

 bp-39756c12-ccb7-4f83-998a-ec8030220630

My system is an HP laptop with AMD Vision A6 processor. My wife uses a Dell all-in-one on the same wired network and does not experience the crash-on-close symptom. This makes me suspect my hardware, but just tested with other browsers:

Chrome - Blocked my home page (never saw that before, but I use Firefox...) until I removed the block from Settings. Closed without crashing. Edge - Updated itself, then gave me the same "Not secure" warning as Chrome, but displayed the home page anyway. Closed without crashing.

In all cases, the link to my home page is specified as http://, not https:// My wife's system is set up the same way.

My question: How can I get Firefox to close gracefully, without spitting out a crash report 1-2 minutes later? Note that I can OPEN Firefox and use it for hours without incident, but if I close it and do something else, when I close THAT, there's the Firefox crash report window underneath.

I just ran the w3.org validator on my home page and I see that a few errors have crept in,. mostly unencoded ampersands. I'll fix those, but if that caused a problem for Firefox, would it wait until much later to crash? And why only on my system, not my wife's?

Suggestions?

Dear Mozilla Community,

Our company use a web application whiches we can connect to customer servers via RDP (Remote Desktop Protocol). The web application uses Spark Gateway. The problem is that if we use the web application with Firefox, we can't use clipboard function.

The error codes in the browser console:

Uncaught DOMException: A network error occurred.

   httpGet https://application.ourcompany.com/hosts/gateway/html/hi5core_min.js:68
   getClipData https://application.ourcompany.com/hosts/gateway/html/rdp_min.js:146
   onCopy https://application.ourcompany.com/hosts/gateway/html/surface_min.js:120

Content Security Policy: The page’s settings blocked the loading of a resource at https://application.ourcompany.com:8384/CLIP?s=ca5311bl-d6bs-67f1c-w501-13dwk0ca54c1&t=2676589901112&type=copy (“connect-src”).

If we use the application with different browser (like Edge or Chrome), we can enable the clipboard on the browser. If we enable the clipboard access for the site (https://application.ourcompany.com), the copy/paste function works well. The problem is that we cannot find enable clipboard feature in Firefox.

My quiestion is, how can we enable the clipboard in Firefox for our (webapplication) site?

Thank you so much for the help!

Best Regards Gabor

Dear Mozilla Community,

Our company use a web application whiches we can connect to customer servers via RDP (Remote Desktop Protocol). The web application uses Spark Gateway. The problem is that if we use the web application with Firefox, we can't use clipboard function.

The error codes in the browser console:

Uncaught DOMException: A network error occurred.

  httpGet https://application.ourcompany.com/hosts/gateway/html/hi5core_min.js:68
  getClipData https://application.ourcompany.com/hosts/gateway/html/rdp_min.js:146
  onCopy https://application.ourcompany.com/hosts/gateway/html/surface_min.js:120

Content Security Policy: The page’s settings blocked the loading of a resource at https://application.ourcompany.com:8384/CLIP?s=ca5311bl-d6bs-67f1c-w501-13dwk0ca54c1&t=2676589901112&type=copy (“connect-src”).

If we use the application with different browser (like Edge or Chrome), we can enable the clipboard on the browser. If we enable the clipboard access for the site (https://application.ourcompany.com), the copy/paste function works well. The problem is that we cannot find enable clipboard feature in Firefox.

My quiestion is, how can we enable the clipboard in Firefox for our (webapplication) site?

Thank you so much for the help!

Best Regards Gabor

Greetings, I've checked a few articles in Firefox to help with my question, but none of them are helping. (Here's the main article: http://example.com.) Here's the situation. Say I go to a website's Contact page and click the button to contact someone, a window appears and asks me what app I want to use to open the email. Gmail is my default email, and Firefox is my default browser, and I use Windows 10. When I open the window of options (see attached screenshot) to open the email, and I then click "Choose Other Application" (other than Firefox), I don't see the Gmail app anywhere. I then followed the directions in that link above to check my Windows settings, per its suggestion, which I did ... but in those settings, too, I got to a point where the directions no longer matched what I'm seeing on my screen. I didn't see the Gmail app anywhere. Could you let me know in simple layperson's terms how to open Gmail links in Firefox? I don't have a PhD in computer science, so please keep it very simple. Thanks in advance! Best wishes, Bill

I am trying trying to install Thunderbird, as told by my Internet Provider. They have indicated they will no longer allow he POP3 version that my email software has because of security reasons and have indicated to use you as a replacement. So when I try to install this software on my computer I get an error message, indicating that the User Name is incorrect and I have verified it several times, I know it to be correct, the only thing that I can think of is that Thunderbird does not accept of ".info" into the software. If so is there a way a to get this added to the software so I can get added to the software? My next question is the ".online" extension is the I would be inquiring about as I also use that extension for my business.

Please let me know. My email address is [email]@joelsphotos.info.

Joel H.

One particular website that I login to frequently in Firefox suddenly stopped opening the login screen when I click "Login." It opens in Safari and Tor browsers, but not Firefox. How do I get the login screen to appear? I have disabled enabled Pop Up Windows for this site, but it still won't load the login screen. It works in Troubleshoot mode. What does that mean and how do I get it to load the login screen in normal mode?

Whenever I press space to scroll one page down the cursor dissapears. The same thing happens when I press `. As soon as I move the mouse it reappears but this is unwanted and annoying behavior which didn't happen in the past. I'm not sure when it started happening but it hasn't been long since that. I tried restarting with all the plugins turned off but that didn't help. I'm using the latest version of FF on Win 7 x64.`

Please help me! Last week, was the victim of a computer scam. I called the 888# pop-up on screen. Looked so real w/MS logo and MS defender logo. I stupidly gave my IP address, name, cellphone #, (which I reported to MS fraud division and the FBI). (I installed a VPN, after the fact.) I can't believe I was so taken in by this guy.

  I went to my bank in person and gave them my new email address.  I tried to log in to my online banking today. Message "Secure Connection Failed. You are not securely connection to this site.Your connection to this site is not private. Information you submit could be viewed by others (like passwords, messages, credit cards, etc.) "
Now, I'm terrified that this scammer has access to my computer.
I'm afraid to access my online banking. He may even have access to my other online accounts, such as my cable, retail stores, etc. where I changed my email addresses and passwords.
Even if I can get "securely connected" how do I know I'm safe from these guys who have my IP address?
 What can I do?  Can someone please help me? Or make a suggestion as to where I can go to resolve this (if possible?
 Thank you so much.

Hello,

I am running Firefox v101.0.1 (64-bit) on Linux (Pop!_OS, installed as a flatpak). I am using the default system theme in dark mode, though switching to the Firefox dark theme or other themes does not change anything. When I allow the Menu Bar (File, Edit, View, etc.) to be present, the browser tabs on the next line are aligned correctly, going all of the way to the left. When I uncheck the Menu Bar, however, a gap appears to the left of the tabs. I have not seen this behavior on Firefox in other environments (Debian, RHEL, Windows), and I'm wondering if there's a way I can remove that gap. I have attached screenshots showing how the tabs are aligned with and without the Menu Bar.

Thanks so much!

I am using Ancestry.com - and Firefox keeps trying to autofill fields it has no business with or understanding of. While autofill is handy at times, it's a downright nuisance - making my research way more tedious because I have to continually erase its autofilled data as erroneous. Is there a simple and temporary way to stop autofill?