This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can't Log Into Secure Websites

  • 1 reply
  • 0 have this problem
  • 1 view
  • Last reply by cor-el

more options

I recently bought new computer with Windows 11 Home Edition. Downloaded FIREFOX browser and migrated in my bookmarks, (which worked GREAT!!!!). Then I attempted to log into the Your Neighbourhood Credit Union (YNCU) website. I could enter my user name, password and security question but then I received a message, on their website: "The system is experiencing problems. Please try again later." (see attachment below). After working with YNCU staff for HOURS, it was suggested that I log in using "Microsoft EDGE" browser. My login was accepted in seconds - NO problems. Today I attempted to log into the Canada Revenue Agency (CRA). Again I was able to enter my user name, password and answer to my security question. The response I received was: "404 -- NOT FOUND From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1: 10,4.5 404 Not Found The server has not found anything matching the Request-URI. No indication is given of whether the condition it temporary or permanent. If the server does not wish to make this information available to the client, the status code 403 (Forbidden can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address." I immediately attempted to log into the CRA website using "Microsoft EDGE" and was IMMEDIATELY granted access after entering security information. I REALLY LIKE using the FIREFOX browser - and detest using Microsoft EDGE, but unless this access issue is resolved I will be forced to use EDGE :(.

I recently bought new computer with Windows 11 Home Edition. Downloaded FIREFOX browser and migrated in my bookmarks, (which worked GREAT!!!!). Then I attempted to log into the Your Neighbourhood Credit Union (YNCU) website. I could enter my user name, password and security question but then I received a message, on their website: "The system is experiencing problems. Please try again later." (see attachment below). After working with YNCU staff for HOURS, it was suggested that I log in using "Microsoft EDGE" browser. My login was accepted in seconds - NO problems. Today I attempted to log into the Canada Revenue Agency (CRA). Again I was able to enter my user name, password and answer to my security question. The response I received was: "404 -- NOT FOUND From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1: 10,4.5 404 Not Found The server has not found anything matching the Request-URI. No indication is given of whether the condition it temporary or permanent. If the server does not wish to make this information available to the client, the status code 403 (Forbidden can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address." I immediately attempted to log into the CRA website using "Microsoft EDGE" and was IMMEDIATELY granted access after entering security information. I REALLY LIKE using the FIREFOX browser - and detest using Microsoft EDGE, but unless this access issue is resolved I will be forced to use EDGE :(.
Attached screenshots

All Replies (1)

more options

You can check the connection settings and check for possible issues with a Proxy or VPN service.

  • Settings -> General -> Network: Connection -> Settings

If you do not need to use a Proxy to connect to internet, select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See also:


You can check for issues with Total Cookie Protection.

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, DuckDuckGo PE, Disconnect, Ghostery, Privacy Badger, uBlock Origin), always make sure such extensions do not block content.


You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • hold down the Shift key and left-click the Reload button
  • press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings), click the padlock icon (Clear cookies and site data) for the domain in the selected tab.

"Remove the Cookies" for websites that cause problems:

  • Settings -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Settings -> Privacy & Security
    Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

You can check for issues with Enhanced Tracking Protection. Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

  • click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages like blocked content.