Firefox Community Forum

When trying to launch the browser from a network folder, I encounter the errors shown in the screenshots. If I launch the browser on one computer, everything is ok, but if I need to launch it on at least the second one, I encounter this error until I close the browser on the first one. I don’t know what could have happened, because I didn’t touch the configuration and everything worked fine for us last year. Nothing was updated or changed. Firefox Portable ini file configuration:

I had no problem accessing XFINITY.com until today. Today, I had to change both my username and password with XFINITY.com. Thereafter, the my mozilla/Firefox asked whether I wanted to delete my password and username with XFINITY.com (and it said that my choice cannot be undone). I clicked "yes," since it was showing my OLD username and password (which I wanted to get rid of). Now, however, Firefox will not allow me to access XFINITY.com, and it shows the following: Access Denied You don't have permission to access "http://www.xfinity.com/sitecore/api/learn/neptune/customer/existing/postauth?" on this server.

Therefore, I'm asking for help to restore my access to XFINITY.com using the Firefox browser. (I use Windows-11 and I use a Dell laptop)

Thanks!!!

Hello! Today, suddenly, a video player disappeared on the Twitch streaming service (see screenshot), but the stream sound is playing. I tried clearing Firefox data and later reinstalled the browser completely - didn't fix the problem. I installed two versions (115.17.0esr and 115.23.1esr) because I thought the problem was an update. Both versions of the browser have a problem. In another browser, this problem is missing, Twitch is working! Operating system Windows 7 Pro SP1. Can you please tell me how to solve this problem?

Firefox tries to install helper each time I try to open Firefox. It seems to install and then repeats each time I try to open the software. If I cancel it will not open either.

Hello. I love the feature. I didn't know it was a new feature because I started using Firefox around April. I saved my group tabs, very happy about it. Then I close and save it, then I opened it again, it was great!

I am a student, I use my group tab to add the tabs that have the resources that I need to, and would also like to study for more knowledge and for my next school year.

There was no problem at that whole time. In April 21, there was no problem until April 22, 23 no problem. But I forgot my charger at that time, because I was at my mothers house. Then I wait for weeks for my charger to come back, about 2 weeks for my laptop to revive there in my grandparent's house.

When I got my charger, and opened firefox. Wait, but at first when I opened firefox, it showed me that there is a new update, an update about tab groups that I already now. I looked at my group tabs, and they are not there anymore.

What should I do to get them back.

A file called 'Pending Pings' appeared within the folder in which my Firefox installation is located. I last used Firefox on May 14, 2025. I don't know how it appeared as I disabled automatic updates and made it so it would ask me if I wanted an update, so I do not know why it is.

Hello: Thanks for creating Firefox. This is my first question after more than a decade using it. I couldn't find proper information about this. This week Firefox started to show a tiny shopping cart icon over the task bar icon of Firefox (image attached). I don´t know what it's and I can't find the functionality that make that appear. So, How do I disable it? I use Firefox everywhere, and I don't like it, specially in my job's laptop as my boss can occasionally see it and it's obviously not work-related in my case. I use chatgpt to get answers and it points to a "Shopping Assistant" feature, but I don't find it. Is it related? The term is so common that I couldn't narrow down to my specific question (what is it and how to disable it)

I use windows 11 and 138.0.4 (64-bit)

Thanks in advance for help

OS: Windows 10 (64 bit) Thunderbird 128.10.1esr (32bit)

I have used Thunderbird without issue for a few years. Today, my inboxes are partially full and emails have mysteriously disappeared. I opened it in safe mode and all the emails are there. I followed help suggestions to disable extensions and addons. The emails have not returned to my inboxes but still appear in safe mode.

I am not a techie and find this very challenging.

Please please could someone help me? I would be so grateful. Thank you in advance. email: jj.7@gmx.us Best wishes JJ

the website blockclubchicago.org is blank on firefox, but not chrome. The website is included in the Enhanced Tracking Protection exception list. Why won't my firefox display any pages from this website, but they are all visible on the chrome browser? Please try it on your desktop browsers.

为什么 Firefox 115esr 会把 User Agent 中的 Windows 版本号强制设为 Windows 10？

我是在 Windows 7 下使用 Firefox 115.xx.x esr ，不知从哪个版本起发觉 User Agent 中的 Windows 版本号强制设为 Windows 10 ，请问这是为什么？

I am using Firefox 115.xx.x esr under Windows 7, and I don't know which version of Firefox 115.xx.x esr has forced the Windows version number in the User Agent to be set to Windows 10, why is that?