Firefox Community Forum

Firefox consuming too much Memory, ranging from 1800 MB up to 2000 MB, causing my other programs (most notably Corel WordPerfect) to constantly crash. How do we resolve this?

Maybe after update, or i dont know why, but now. when youtube (or any other videoplayer) in fullscreen - taskbar menu is visible (Is on topscreen). In google chrome problem is not repeats. I'm using StartAllBack app for classic start menu, but till that day all was fine. I checked on two devices with firefox - the same problem (StartAllBack or windows version wasnt cahnged). Windows 11 24H2

I have tried every support advice I can find and no matter what I do passwords are not restoring. Here is what I have done: Opened about:profiles Opened profile folder Exit firefox transfer key4.db and signons.jstor files from backup to the new folder

Nothing happens.

I have tried creating new folders and following those steps. I have tried everything.

as of last week sometime, videos in my CRM (customer relationship manager) have stopped working. When I use a different browser, ie: Edge, everything works correctly. My CRM company tried to dupliocate the issue on their system using Firefox but they were not having the same issue. Something in my Firefox version 138.0.1 is causing an issue. Can you help troubleshoot and correct my issue?

I just got a new pc, and added Firefox, and also imported all of my bookmarks. But I don't see any way to add tiles to the new tab page. There are no Tiles there, even after 3 days. I really like having the links I visit most listed in tiles on the new tab page. Why don't I have any and how can I add them? I don't see anything the settings, and the help answers don't help because there are no tiles to right click on.

I'm currently using MacOS 15.4.1 Sequoia with FireFox 138.0.1. It works fine after updating from 138.0.0 on my primary (Administrator) account. However, there is a second User account on this MacBook Pro laptop, used by other family members. All is not well here... Firefox updated itself from 137.0.0 recently and now will not run on the User account. On startup, it asks for an Administrator password to install a Helper tool and then will proceed no further. I have tried :-

Making the User account into Administrator - still hangs Cancel and re-start FireFox - hangs! Re-start the MacBook from cold - hangs! Cleaned Firefox installation and folders in the User Library (both User and Administrator) - still hangs! I'm aware there are two Library folders, one each for the System and one for each user, didn't touch the System Library. Added a new User account - it works! So maybe something in the System Library is the culprit? I've always regarded that area as "off limits" to us mere mortals, so please, not the "Wipe it and Start Again" option.

I don't really want to kill the User account, there is a lot of data in there and surely will miss something important if I delete it.

Summary, 137.0.0 worked, it updated to 138.0.1, it hangs up! I am unable to fix it. Any offers guys?

Hello, I've updated my Nvidia graphics driver and encountered this issue. Basically I noticed it on twitch.tv mainly, bottom of my website is hidden behind taskbar, as if firefox thinks I have the automatically hiding taskbar setting enabled, which I never used. I've tried deleting some json file from %appdata% which has not helped, tried reinstalling firefox, running in troubleshoot mode,disabling hardware acceleration and nothing helped. Here are screenshots of how it looks fullscreen and how it should look, as you can see the bottom section is missing. Thanks in advance

When I open any stream, it takes about 2.5 seconds from the start of the page loading to the appearance of the stream image and playback. For comparison, in version 137 it took about 1.0 seconds.

I tried to launch the browser (Firefox 138.0.1) in troubleshooting mode, and also created a new profile, but the problem remained.

I also downloaded portable versions: 137.0.1 - everything is fine. 138.0 and 140.0a1 - slow loading.

I also have Zen Browser installed (the latest version is based on 138.0.1) - everything is fine.

- Translated via Google Translate.

I'm running v138.0.1, but the ability to group tabs that was supposedly introduced in v137 is completely absent from my browser. I can neither drag tabs onto another to create a group, nor create groups by right clicking on a tab. What's up with that?

When I hold control on my Mac and click on a Tab the box that opens has no option to rename or to group the tabs together....I am running Firefox 138. Clearly I am missing something. It offers a function that would save me a lot of time, I hope you can help

Craig

I have Firefox on two computer (plus my phone), both of them are running Linux Mint. On pc#1 Firefox behaves ok; on pc#2 instead it's abnormally zoomed in and it is very annoying to use. I am logged in with my Mozilla account on both devices, they have the same settings and Firefox is the only application displaying this behavior. If it matters, pc#1 has a bigger screen. I've attached a screenshot of the same page visualized on both devices as to show the difference.

(I am posting this from pc#1)

Can you allow someone to get on my computer to help me? Or do you have a phone number I can call safely to have someone go through things with me, if I need help? It stated when I put it on that is is "poor" in terms of what you did. Maybe I am doing something wrong??

Today, when I logged onto my computer, something went wrong and Windows had to repair my C: drive before it could continue to boot up. Once it did, Firefox was changed. Some of the shortcuts on the windows were missing and I couldn't get them back with the command to "Dismiss" the substitutes. More serious was my new inability to log onto any sites besides Mozilla's. I have tried restarting the computer and turning off my router and turning it back on again. All the while, my Android phone account is able to login to some of these sites without difficulty. I need to diagnose this problem and fix it. How can I do that, please?

Gmail will not open with Firefox as of Wednesday 5/18/2025. I do not have any adblock extensions running.

Gmail opens fine in Chrome.

Any suggestions?

Since upgraded to 138.0.1 my Firefox browser can't reopen after closing when multiple extensions are enabled. If run in safe mode or have all extensions disabled it can close and reopen correctly but when more extensions enabled firefox.exe will stay in background after closing and I can only reopen it after ending the process in task manager. It has never happened before.

Here attached all the extensions I have enabled.

For reasons that are not clear, a few days ago, Firefox would not download any files — giving a failure message. I have tried all the different ways of resetting, disabling extensions etc, and even deleting Firefox and re-installing, but that has not solved the problem. Help!