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Similar to the issue described in this thread (https://support.mozilla.org/bm/questions/1240674), I am unable to open Firefox - it simply refuses to open. I've tried multiple times, the option key, and re-installing. Nothing seems to work, which suggests something about my user settings is the issue, but a) I am not keen on deleting this if possible and b) I won't delete my user settings unless that is necessary. Like the attached thread, I am happy to attach crash reports, but without the ability to even open Firefox properly it's not obvious how I do this - force-quitting it just sends a report to Apple.

Any help much appreciated - I'd quite like Firefox working again.

My laptop is a MacBook Pro 13 2020 (Intel) running macOS Monterey (12.7.4). I installed the version of Firefox available for download as of writing (v127.0 based on Finder).

Secure connection failed and Firefox did not connect Firefox Last updated: 01/16/2024 39% of users voted this helpful

This article explains why you may see a Secure Connection Failed or a Did Not Connect: Potential Security Issue error page, and what you can do.

   If you see a Warning: Potential Security Risk Ahead error page, see What do the security warning codes mean? and How to troubleshoot security error codes on secure websites.
   To troubleshoot other error messages, see Websites don't load - troubleshoot and fix error messages. 

Table of Contents

   Secure connection cannot be established
       Secure Connection Failed
       Did Not Connect: Potential Security Issue
   Website issues
       TLS version unsupported
       HSTS required
   Security software conflict
   Incorrect system clock
   Other secure connection issues

Secure connection cannot be established

When a website that requires a secure (HTTPS) connection tries to secure communication with your computer, Firefox cross-checks this attempt to make sure that the website certificate and the connection method are actually secure. If Firefox cannot establish a secure connection, it will display a Secure Connection Failed or Did Not Connect: Potential Security Issue error page. Secure Connection Failed

A Secure Connection Failed error page will include a description of the error and a Try Again button. There is no option to add a security exception to bypass this type of error.

Fx97SecureConnectionFailed ~~~ The url gives me this can you help please its not bitdefender total security blocking it I dont think https://support.mozilla.org/en-US/kb/secure-connection-failed-firefox-did-not-connect?as=u&utm_source=inproduct

I'm unable to watch videos on Crunchyroll. When I try to watch a video, the video becomes a static image of one frame. When I switch tabs and come back to the video, or hit refresh, it changes to the latest frame of the video but freezes once again. I have the latest version of Firefox and am using a Macbook. Per suggestions I have found online, I have tried disabling all my extensions, deleting my cache, deleting the Firefox folder in my ~/Library, making sure DRM content is enabled, and uninstalling and reinstalling Firefox altogether. Nothing works. Was hoping to switch over to Firefox since Google Chrome has banned ublock origin, but I keep running into these obnoxious video problems. The same issue also happens on Amazon Prime Video, but only when I press full screen.

I just installed 3 Add-ons Free Memory, Free Memory Button and Ramback but, apart from them showing on the Add-ons Manager, I can't find them let alone open them.................Does anyone know where they could be or what happened? Thanks in Advance

All of a sudden when I open Firefox a dialogue box from Software Update appears and asks for permission to make changes to my computer-- never happened before. My preferences are set to automatically update and my app list says I have the latest version of Firefox (129.0.1). I've checked Firefox properties and there is nothing selected under compatibility mode (I read on the forum this could cause the pop up). I can’t figure out what changes Firefox’s Software Update wants to make if I already have the latest version (so I always say no). The Firefox update to 129.0.1 was 8/14 but this dialogue box only appeared a few days ago. Is Firefox just not working because it’s not getting the automatic update message sent to maintenance? Do I need to uninstall and reinstall the maintenance program? And if so, how do I do that? (Windows 10)

Hello, Since the version 128 (x86_64) on Windows 11, SSH links are no more opened with the user. The link tooltip at the bottom of the screen is showing the link without the user too. Ex: ssh://root@10.0.1.1 -> will open ssh://10.0.1.1 instead. Thank you in advance

Since the last update (was executed today in my case 16-07-2024), firefox has been very slow and freezing and crashing. Also, somehow it is the only browser that can't handle yahoo finance new charts and keeps freezing....so many issues in a short span of time, please check. I have tried other browsers and things seem to work fine there, so, it is not my computer or OS.

I have encountered PR_CONNECT_RESET_ERROR for the last few days. All websites cannot be accessed. I tried to uninstall/reinstall Firefox several time and nothing works. My system is Windows 11 Home, Version 22H2, Installed on 2/7/2023, OS build 22621.4037. Kaspersky Anti Virus is 21.3.10.319(m).

Hello!

When I try to log into a medical chart I keep getting the following message,

Oops!

Server is missing the required Special Updates: E10513993, E10515928, E10516261, E10516347, E10516634, E10517430, E10517163, E10518158

I have the latest Firefox update and can't find the above updates to install them. Please help. Thank you!

I use Sync on multiple computers for passwords. I have forgotten the Primary password on one of them. If I do a password reset on the one computer, does it affect the passwords stored on the Sync server, or maybe just the key4.db and logins.json folders on the computer being reset? I will not do a reset if the Sync'ed passwords could be affected, I'll just look them up on my phone. Thanks for your help!

When I enter a site like Sephora, Menards, Ulta, and Target I either automatically get an Access Denied error or get one when I try to navigate from the home page. These websites also either won't let me log in to an account or will immediately kick me out of my account after logging in. I've tried everything I could find online and nothing has helped. I am on the latest Firefox software.

Here is an example of the error message: Access Denied You don't have permission to access "http://www.sephora.com/shop/makeup-cosmetics" on this server.

Reference #18.460dc17.1724630066.2ccd664f

https://errors.edgesuite.net/18.460dc17.1724630066.2ccd664f

Hello, the Secure Connection Failed started up after one of your recent updates. It is affecting News Max and my banks internet banking software. Both sites work fine in MS Edge. The fix I read on your site said to try this: "In the Location bar, type about:config and press Enter. The about:config "This might void your warranty!" warning page may appear.

   Click I'll be careful, I promise! to continue to the about:config page.
   copy the next security.ssl.enable_ocsp_stapling and paste it in the search field
   double-click on it to make it false
   close the page, exit firefox and restart it. "

Doesn't work for me. What else can I try?

Take care, Doug

Up until the last couple days I have been able, for years, to enter a search query in the search bar. It no longer works, but the bar is still there.

Will this be fixed? Kind of a deal breaker for me. I have this functionality with other browsers.