Firefox Community Forum

Browser shuts down within 10 -20 seconds of going to a website, and I get a crash report which I have clicked to forwarded each time to Mozilla.

Also have a new error message at the top of the browser that says: "The security sandbox is disabled. Your configuration is unsupported and less secure." (image attached)

Not sure if that is related or not.

I recently enabled Firefox's built in VPN. Signed into my Mozilla account, and when I toggle the VPN ON, every site gives "Secure Connection Failed". If I toggle the VPN OFF, it all goes back to normal.

Hello, I have multiple devices using Firefox on the same network, and whenever using them at the same time, I get an additional Firefox icon in my doc which will open whatever tab is up on the other device. I was not signed in to any account on either device, yet it is still sharing tab data across devices.

I then created an account and signed in on one device and disabled every Sync option I could find, but still the sharing is enabled over local network. How do I disable this so there is no communication between the two devices?

Device 1 - MacBook Pro (Retina, 13-inch, Early 2015) macOS Monterey 12.7.6 Firefox Version 149.0.2

Device 2 - MacBook Pro 14-inch, 2023 macOS Sequoia 15.4.1 Firefox Version 149.0.2 Local Network access disabled for Firefox in macOS settings

It doesn't seem like this should even be possible given that local network access is disabled for the one device, and neither device is logged into a mozilla account.

Can someone please help me disable this functionality?

Dear Sirs! I've been trying to install FF in several ways. Using installer.exe and setup150.exe. I started these files from same disk as the system (C), Temp folder empty and unlocked for read\write, located where it should be C-user-appdata-local-temp. I started files as administrator. Each time the setup fails with system notice like on the picture attached. It says "can not find specified file"

My notebook is very old, but it runs Win 10 OK, Chrome is OK also

Intel(R) Core(TM)2 Duo CPU P8400 @ 2.26GHz 2.27 GHz 4,00 Gb SSD 224 GB SSD P4-240 Mobile Intel(R) 4 Series Express Chipset Family (Microsoft Corporation - WDDM 1.1) (64 MB) x64 system

Please help!

I am using the automatic update function. Since one of the latest updates (14X) the download window no longer shows the original file name, but it remains blank. This might be due to an enhanced security feature, but I did not find details so far. Any hint where to look or how to fix the problem would be appreciated.

Thank you in advance, Christoph

Very often, when I hover over my tab group, the list of tabs inside it doesn't expand so I can quickly navigate to it. I have to completely restart the browser, which is inconvenient. And I no longer want to use a special extension for permanent pinning. Please fix this, developers.

When I try to open Firefox, I get a box saying it is open, and I must close it. I do so, and a new Firefox pops up. However when I try to close that, it won't do so.

After an unwanted and un-needed update, all my tabs closed and I can't find them again. Then after rolling the browser back to a previous version, now all of my bookmarks are gone. I want them back where are they on the hard drive.

First of all I would like to know why I have to surrender my personal information to get support. If I get one spam email or text I'm going to be pissed and on here looking for the person(s) responsible.

Good morning, We are using ver. 150. We have noticed that the landing page for Microsoft 365 does not have the apps tab on the left side of the page. Microsoft has redirected the Office apps landing page to a Copilot centric web page. There is a small Apps tab on bottom left which does not display on Firefox. Anyone have an idea why ?. Thank you,

Martin Reyes