Diễn đàn hỗ trợ Firefox

I've searched other forums and I am not having any luck. If I open 1 Firefox browser then 10-15 open instances will show up under Task Manager. They load automatically. This slows down everything and I have to delete the excess browsers. Would you please offer some advice? Thank you in advance.

Hello,

As the title implies, Firefox has been super annoying to use these past few days after moving a tab. I shift tabs around a lot to keep them organized, yet for the first time ever, shifting a tab has caused a permanent glitch on Firefox.

The preexisting workarounds are to try moving a tab to "unfreeze" the address bar and toolbar, or to move the window to another monitor and letting the issue fix itself, but both options have not done anything.

Additionally, as shown in the image attached, the "moved" tab winds up being a floating tab that is unclickable and floats "above" the other tabs. That tab can be accessed only through the CMND + tab option, which is also another inconvenience.

Really hoping the community has a solve because I transferred from Google Chrome due to Ublock becoming obsolete on that browser, and I would prefer not having to find another browser. Thank you!

This started after the recent update. Any time i open more than 1 firefox window or try to move my window to a different monitor, the Menu Bar pops up and left click will be stuck only making the bar appear/disappear. I just have to close the second window because it becomes immediately unusable. I have the ui setting set to false but it still freezes new windows and doest let me click or type on anything. I've uninstalled and reinstalled, ran troubleshoot mode, got rid of extensions, reset my computer. I'm at a loss. Any help would be great

I've been having an issue of, whenever I tab into Firefox from a different application on my computer, the alt menu opens. Firefox seems to be interpreting me opening the program as pressing the alt key, because even when I have the menu bar set to always be open, the input immediately goes to the "File" dropdown option of the menu, just as it would if I pressed the alt key. However, I tried to troubleshoot this by 1. opening a program that tracks keyboard inputs and that didn't show such a thing happening, and 2. I checked if this issue was happening with other applications that have switch the input to the upper menu bar when the alt key is pressed, and that was not the case. This is making it a lot harder to use Firefox, as using a keyboard shortcut to open a new window (ctrl+shift+p, or ctrl+i) while in a normal Firefox tab, it will not automatically open to the new window (as it is set to do automatically), it will also not let me open the new window -- either by alt-tabbing or by clicking the new window on the windows taskbar -- and instead reopens the alt menu and sets the input to that menu, locking me to the original Firefox page unless I tab into a completely different application and then into the new window. This issue also makes me unable to input key commands or text into my active tab immediately when I reopen it, instead forcing me to close the alt menu first either or clicking somewhere on the page. And since I don't keep the alt menu visible at all times, this forces the screen to shift up and down jarringly when I'm simply trying to use the computer.

I'm using Firefox on a Windows 11 computer. I've tried refreshing Firefox and have tried my absolute best to find articles related to this issue but to no luck. Thanks for any help or advice!

Hi Firefox community, I’ve recently been experiencing slow performance and occasional freezing when using Firefox on Windows 10, especially when multiple tabs are open or when streaming video content. I’ve tried basic troubleshooting like clearing cache and disabling a few extensions, but the issue still persists.

Could anyone suggest the best methods to improve Firefox performance? I’m particularly interested in:

Recommended performance and memory settings in Firefox

How to identify problematic add-ons or extensions

Whether hardware acceleration should be enabled or disabled

Tips for improving video playback and reducing CPU usage

Any tools or diagnostic steps for deeper performance analysis

Any help or guidance would be greatly appreciated. Thanks!

Even with just 1 tab open, Firefox is killing my laptop battery.

Win 11 PC laptop.

In background, it is using 40% to 50% of the laptop battery. I need much better performance from it. I have already turned off any settings I can find regarding Firefox's background functions. When I quit Firefox I want it completely off.

How can I do that?

For some reason, the Menu Bar kept coming up, even after I disabled it. I tired a few about:config things, the one that seemed to work was to disable the ALT key. But I still can't click anything in a game with my mouse while firefox is open. I have two monitors. I have uninstalled and reinstalled Firefox. I've looked around the internet and I can't seem to find my exact problem. Please, please help!

I use a Mac running macOS Sequoia 15.7.2. Each time I attempt to login to https://music.amazon.com, Firefox freezes which then requires me to quit Firefox and restart. Therefore, I need to use another browser to access the site. What is the solution to this issue?

Hi! I have extension and user scripts and such. I can make memory reports, but I can't determine anything since there's too much stuff in there that I don't know anything about. Is there a tool to help me point out issues, or is there by chance people looking at memory reports like this on occasion? The reports themselves are 80-100MB within the .gz files. Which are compressed to 5-6MB. Not sure if full are necessary or anonymized reports are enough. Not sure what sensitive info they may contain.

Hi, after latest update just now, the browsers uses up to 45gb of ram within a few minutes! Not sure what it is, I am on MACOS Sequia Version 15.6.1 (24G90) macbook pro M1

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.

A couple days ago, some weird issues have started:

• All my bookmarks are gone
• Any of the buttons in the UI that open a smaller UI do not work (such as the 3 bar menu)
• Similarly, right clicking to open a menu (such as "Save Image") also does not work
• Any dropdown menus in websites seem to also not work. For example, in this very support page, I could not select an option in the "Which topic best describes your question?".

I can't restart and troubleshoot Firefox since I can't access the 3 bar menu.

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.

Hello,

I am having an issue where my menu bar continuously shows up. If I create another tab and drag it to create a new window, it goes behind my active window. When I try to change to that window it continuously opens the menu bar and refuses to allow me to change. I have to minimize my current window and drag the other window to get it to focus. Alt + Tab does not work to swap between them. Every time I click an application and click back to window the menu bar appears again, sometimes I have to click 3-4 times before it goes away.

I have tried made sure it was not my keyboard with an alt key stuck, tried multiple browsers, only firefox is the issue. I've created a new profile with zero extensions, the issue persists. I've also completely refreshed firefox with no success. Made sure all my drivers were updated and restarted the PC, unhooked the keyboard, nothing works - it continues to have issues. Running out of ideas here. I've also tried the below below solution for the menu bar and again, no luck. Any help would be great. Thanks!

The attempted menu bar fix I've tried:

Type about:config into the address bar and press Enter. Click "Accept the Risk and Continue". In the search bar, type ui.key.menuAccessKeyFocuses. Double-click the entry to change the value from true to false. Restart Firefox.

-Michael

Whenever I try to switch applications, firefox forces itself on top. And if i try to switch applications without the use of the windows key (I use two monitors), I will be unable to switch to the application until I press that windows key and manually click it. Whenever I try to switch, the Menu Bar opens up. So, when I try to switch applications firefox doesn't let me. Other programs do except firefox. I have no idea if it's a result of an option or keybind. Please help

Hello all -

I ran into an error earlier in the week which forced me to reset the data of my firefox account. Today, I was trying to look at the Inspect (Q) option on a website, but when I clicked on it, the box was empty and did not have the CSS code there.

Does anyone else have this issue? And is there anything I can do to fix it?

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)