Diễn đàn hỗ trợ Firefox

recently Firefox has started leaving a small gap at the top of the window with the desktop background (the light blue in the screenshot) is visible when the window is maximized.

This issue doesn't occur with any other program and occurs in troubleshoot mode.

I believe I had all this synced in Firefox Settings before I made the upgrade. Like all you fellow former users of Windows 10, I had to upgrade to Windows 11; and did so two days ago. Now, I found that I do not have under History any of the former sites I not only visited but also had tabs open. What can I do, if anything, to recover them? Under the Add-ons Manager, if this helps, I already had the app Tab Session Manager, but don't know how to use it. Thanks to all in advance who may have made this same upgrade. Many out there are still on Windows 10.

Would like to test nightly builds of Firefox - how best to get started?

I am a user of Ubuntu and interested in testing the Firefox Nightly via snapstore.

Any pointers helpful.

I have the problem that if a stream is playing (Youtube or other video sites) and iam on another tab that the stream stopps/hangs for a second...

It seems to hang also if iam scrolling on another site while the video is playin in a not active tab.

If iam on the active tab where the video is playing it is working fine and no stopps/hanging.

So there seems to be a problem with playing streams/Videos on non active tabs...

I testet Linux Bazzite and there wasnt this problem with Firefox.

So seems to be a problem with Firefox in Windows...

I recently opened Firefox to see a new flagged warning under my toolbar that says "The security sandbox is disabled. Your configuration is unsupported and less secure."

I have gone into about:config and adjusted every security.sandbox element to see if that would change anything; it did not.

I am running on Windows 11 Home so I cannot install or properly run Windows Sandbox.

I would either like a solution to enable the sandbox once again, or just remove the notification from the toolbar.

I have Firefox Settings UNCHECKED to open previous windows and tabs, yet it very often tells me it's having trouble opening previous windows and tabs.

I want it to quit trying to open previous windows and tabs on this computer. How can I do this?

I uninstalled Firefox on my computer and reinstalled it, but when I logged in, the account couldn’t sync, it was as if the sync couldn’t retrieve any data from the server. Nothing happened at all.

On my Android phone, the data is still there, but when I tap “Synchronize now,” nothing happens either. I’ve tried signing out and signing back in multiple times, but still nothing works.

I also tried switching to a different computer and a different internet connection, but it still didn’t work.

What should I do now?

I'm taking my bi yearly Brain test and it wants to access my microphone so I can speak into it but I can't figure out how for them to access the microphone. I've done what Windows told me to do, go to start>settings>privacy and security>Microphone and made sure it was turned on but that didn't work. Is there something in Mozilla that I can do?

Hi, i like to share idea of tab group improvement. I have more than 20 tabs, and i clean, move open tabs to groups every week, to lower opened tab amount, so i don't need to scroll much. But when i want to consume tab group content, i need to read them all to see what i want to consume... Solution, i would like option to sort tab groups by name, that way it will be faster to find what i want. Also it would be easier to find what tab group to add tab when i clean, move opened tabs. I have more than 500 tabs in my tab group. I finally decided to stop YT search, instead clean my tab groups. Thanks for reading.

Unlike before, many sites that I visit regularly, I am now having to log in every time I visit, including support.mozilla.org.

Did I unknowingly change something, some setting? or perhaps it's due to an addon?

version 145.0 problem with bookmark bar not showing when set on 'always on" setting. I have replaced the places.squlite folder with another one from a previous computer. there is only one profile available in the user lib on my mac os Tahoe and have done this replacement file numerous times in the past so don't know the the problem is. Any help would be apreciated.

Sometimes, when I have multiple windows open, closing a window won't completely close. It leaves a blank area where it was, the title of the window is displayed, but clicking in the area just switches to one of the other open windows, and there seems to be no way to finish the process. This has been a problem through the last few Firefox updates. Any thoughts? OS -- macOS Tahoe 26.1 Firefox -- 145.0 (aarch64)

I love Firefox for Mac, but, on iPad and iPhone, it's impossible to use extensions such as Winger to save tabs. Too many times, I've lost 100 to 200 tabs at once, and so I switched back on iPad and iPhone to Safari. I never had a problem with Safari's built-in window-tab saver on iPad and iPhone but lost thousands of tabs on Mac, hence my move to Firefox on Mac.

On Firefox on Mac, when I click on Firefox View, I can view tabs from other devices, but there's no way to copy multiple tab links at once (you have to go one by one). If I ever were to shift back to Firefox for iPad and iPhone, does anyone know of a way to easily save 100 to 200 tabs from these devices?

I would rather use Firefox because I can't stand how Safari opens links from outside Safari, forcing the use of some new default window over the named window I already have open. It's so much work to micro-manage this browser.

Thank you kindly and enjoy a super day!

I am having trouble accessing The Washington Times with Firefox. Every time I click on a story, it comes up, but then immediately the screen shades out to a gray screen, and nothing works. Also, if I open The Times website and click on sign-in for my account, nothing happens. If I go directly to the Times website and try ti sign in, the screen greys out again. This just started happening yesterday. If I go to a laptop with an earlier version of Firefox on it, all works just fine. Also, if I access the Washington Times with Microsoft Edge, it works just fine. Would appreciate it if I could get some help here.

google is saying cookies are disabled when using FF to login. This was working Privacy is set to STANDARD and I went into settings and removed google.com as well to no avail.

How do I fix this?

Thanks leon

Tonight I received a notice that a new version of Firefox was available and asking if I wanted to download it. It showed me the new Kit mascot so I decided to let it install. It seemed to install normally but when it tried to open what I guess is a welcome/new features page, it crashes, and just showed a prompt to try again. This continued in an endless loop and I had to shut it down. Unfortunately I no longer had a functioning version available that I could find so I downoaded the ESR version to be safe (ver 140.5.0esr) which I am now using. Somehow I was able to recover bookmarks and hopefully other saved info. Can anyone advise what has happened? I have used Firefox for many years and never had this sort of problem before. Running Windows 11 on a new Dell i7 PC.