Firefox Community Forum

I have just opened MS Teams on my Firefox 137.0 on my WIndows 11 and I get a blank screen. NOthing happens. I see that by looking in Edge the format of MS Teams layout has completely changed. I imagine that there's a setting to change to enable teams to work but how can I find it?

'Running ver 137 and now cannot print to my system default printer. Tried the Troubleshoot fix and same result - defaults to PDF. Is there any entry in about:config to ensure system printer is selected. I have checked all system settings and brother printer is the default.

I am evaluating a password manager application and exported my FF passwords and imported them into the app. For testing I removed all of the passwords from FF. I want to password protect the csv file rather than delete it in case I need to import the passwords back into FF. When I go to File/Info, the "Protect Workbook" option is greyed out. When I go to the "Review" tab, the option to "Protect Workbook" is available, not the "Unprotect" option, so the workbook is not protected. If I click on the "Share" folder on the right side of the ribbon, there is no "More" option. In Windows Explorer the file is on my desktop, not OneDrive - Personal. I right clicked on the file, selected "Give access to" and took the option to remove access. The File/Info option is still greyed out. How can I password protect this file or how can I export it in a format that can be imported later?

I have a laptop that died last week. I just got onto a new device, and would like to restore my Firefox settings from that previous device. So, I downloaded firefox, signed in to sync my bookmarks and extensions... and the old device does not appear in my synced devices list. Is there anything I can do to recover my account data? I know it was synced as recently as a few days ago. The device is completely bricked and I will not be able to log in on it anymore. Is there anything to be done?

When I first open Firefox from the icon in my taskbar the opening window says the following:

'Unable to connect Firefox can’t establish a connection to the server at 0.0.0.4. The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer’s network connection. If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.'

However this is only the first window, after that I can open a new tab in the same window without any problems.

I have uninstalled and reinstalled Firefox without avail. Can anyone help please?

i share my computer and when someone else uses the browser they see the last page I used. Emails open and they can see my private emails. how do I stop this without erasing history everytime I use it

All my other browsers work fine but since April 4, 2025 Firefox won’t work at all. Websites won’t load. I have tried to clear my cache & cookies, I have checked my connection settings, I have checked for malware, I have turned off all my extensions and I have completely restarted my computer several times now, nothing has worked. I also did trouble shoot mode & reinstalled Firefox (though I will admit I maybe didn’t do this step properly). I refreshed Firefox. Why is it not working? What happened? I don’t know what to do as I don’t want to lose all my bookmarks and passwords that I have yet to move over to my password manager. Please help.

I am having a lot of difficulty opening websites ( NYtimes, Washington Post) they takes minutes to open. Sometimes minutes more to open article. ATT says line service is fine. NYT says it service is fine and it works on EDGE Any thoughts?

When I put my laptop to sleep, websites I am logged into are often logged out when I return. Note that I don't close Firefox. The tabs generally reopen but require login again. Windows 11, Firefox 137.0.1

For example, I put my laptop to sleep for lunch. When I returned, tabs were there, but I was logged out of gmail, Discord, and a website I was logged into.

This seems to happen more frequently recently, but not every time, as far as I know. But this is a relatively new problem, possibly related to a new laptop. Occasionally I get a message that there is trouble restoring my session.

I restarted Firefox on my Mac earlier, which I think updated it from 136 to 137. After reopening it, web pages won’t load anymore. They either time out or just load indefinitely without doing anything. I went through the troubleshooting page and tried reinstalling it, which didn’t help. My computer’s firewall is off as well. I’ve tried refreshing it multiple times, and I get a message that Firefox has crashed before it actually refreshes. After that, pages will load normally for a very short amount of time (about 30 seconds) before stopping again. Pages are still loading normally on Chrome and Safari, so it’s only Firefox that’s having an issue. Does anyone have any solutions for what this could be/ways to fix it?

I was trying to go to ssa.gov, today, and hit the button to login. When I did that, I got a 400 page saying: Bad Request

Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

I have done this before, and it worked. To test if it was a problem with the web page or the browser, I did it from another browser (Brave), and it loaded fine. Is Firefox sending a bad request? Is this something you can fix.

I am using Mozilla Firefox for Linux Mint 137.0.1 (64 bit).