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.

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.

Firefox just auto installed the latest version 145.0. After about 15-20 minutes of usage, Firefox stops responding and hangs. I ran the Task Manager (Windows 11) and found Firefox was consuming 96% of the available memory. I have to kill the task to regain control. I'm left with switching to a new browser and will probably never go back.

On google search bar- where is the microphone, or dictation icon. How do I add it. I have windows 11 and using Mozilla firefox as my default web browser. I have search the settings and cannot find it. Please send instructions to add it to the bar. If I were to use chrome/google they have it and I know Firefox did have it. Thank you

Firefox tab crashes whenever I try to open Firefox. I have AOL and Firefox browser. I've tried the close and reload, restart laptop, and redownloading Firefox to no avail. However, I was able to open my AOL and email. I reached this help page using Edge.

The tab group suggestion feature is unavailable for me, even though I am on Firefox 145.0 (64-Bit on Windows 11 Pro 25H2). I tried using guides like [one from mozilla] https://www.askvg.com/enable-or-disable-new-ai-powered-smart-tab-groups-in-firefox/ this external about:config editing guide.

The latter does changes to the about:config. A screenshot of my settings, my config, and my Add-ons is attached.

I do not know what is wrong.

As per the title.

I have a videoeto illustrate this issue

URL https://www.yell.com/ OS Windows 11 Pro v 25H2 Build(26200.7171)

You forced a download of of the new FireFox and it wiped out everything - favorite, history, etc.. even though I have signed into my profile. I don't even have the option to import from my previous version. WTH?!

Hi! So I just installed firefox and I got onto annoying issue. I like using shortcuts on my homepage, but I started to get some shortcuts added automatically and they bother me a lot. I tried removing them or deleting from history, but as soon as I click the button, one shortcuts gets removed and immediately gets swityched with another one automatically. So I'm stuck in the infinite loop of removing shortcuts and my manually added ones just get lost in all this mess.

This morning when I started up Firefox it had a pop-up about the new profiles feature, asking to create a new profile. Just out of curiosity I clicked the create profile button to see what the interface would look like. Since I didn't actually want to create the profile I hit the delete button, but nothing happened. So I closed the window. I then tried delete the new profile (then called "Profile 1") by hitting the trash can from the choose profiles screen. Still nothing happens. At this point my original profile window is still open, but I close everything to restart Firefox in hopes that it will allow me to delete this profile I never wanted to begin with.

The Choose profile window comes up, I select original profile and nothing happens. I can open the new "Profile 1", which I have since labelled "Bad Profile".

D:\Users\<USERNAME>\AppData\Roaming\Mozilla\Firefox\Profiles doesn't appear to have my original profile anywhere.

I'm deeply concerned this beta feature I never asked for has deleted my original profile when it should have deleted the new profile.

It looks like with this new version of Firefox I have to load my saved password file every time I start the browser, and even after doing the reload some of the passwords don't work forcing me to change them, and I would have to do another password save, but if I forget to do it and close the browser all the passwords are delete. I did not have this problem prior to this new install.

Also I prefer to use Firefox as a browser I feel it is way better than Edge and Chrome even though it doesn't work one a two websites I need to use. one only works on chrome the other only works on edge.

Let me know if you need other information.

Stephen Richards [edited emails from public community support forum]

Recently I have been issues with switching between windows of Firefox. No matter how many times I try to Alt-Tab or click on another window it momentarily goes to that window before switching back immediately. The only work around I found is to click a window of some other software and then click the window I want to work on in Firefox. Doing this is not making it switch back to the older window of Firefox again. Please help me in fixing this issue. It's making it nearly impossible to work on Firefox due to this.

If I go fullscreen in any mediaplayer (such as YouTube, Crunchyroll, Prime Video or Jellyfin) I get a bar at the top and a bar in the left. You can see either the wallpaper or another programm, its like shifted to the right and bottom. I know its a problem with tunred off Hardwareacceleration. If I turn it back on the problem never occurs. I tried with troubleshoot mode enabled but there I couldnt recreate it because the problem does not occur, even after I turn troubleshoot mode off. The problem only occurs again after a complete restart of the computer.

I know there are other posts with the same problem but there was never a solution.