Firefox Support Forum

I'm using MacOS Sonoma 14.4.1 and recently, my browser has started freezing up for several minutes. It seems that the culprit is the "fontd" process because when I open Activity Manager that process spikes to %50 to %80 CPU usage. Killing the process does nothing and quitting out of Firefox does nothing either. I made sure Firefox is fully updated, but still nothing. I'm not sure whether it's a problem with my Macbook Pro's fonts or if it's a problem with Firefox, but I'd like my browser to be reliable.

Does anyone know what might be causing this issue or what I can do to resolve it?

I have the latest FF browser. I'm not using any proxy service, just spectrum connection. when i try to access my credit union account, i get this message

"Error: "WWF2TUh4dnM=" - You're using an outdated browser or are using a Proxy service which is unsupported. Please update your browser or turn off your Proxy to continue, thank you."

how can i get past this? All help appreciated!

Hello. I have a pretty big sprite image i am trying to display on my web page but mozzila wont display it. The sprite is 78016px by 1000px and im cropping it to be 736px by 1000px. Sprite is made out of a png sequence that was made in 3d software, now the thing is when i put in the non rendered verson of images(3D viewport colors) which windows labels as 8bit (maybe because of less colors) it gets displayed, but when i put the rendered version which windows labels as 32bit image it wont get displayed on Mozilla. It gets displayed on Chrome and Edge without any problems. The only difference beetween the images is that the rendered version has a transparent background behind the subject...they are the same sized sprite. I will drop the first frames of the sprite in the images section so you can get a better idea. Also all of the code and images is stored locally.

I installed an OBS plug-in for a virtual camera so that I could film my screen and pretend it's a webcam. I was able to use the virtual camera or my webcam on spelltable.com by selecting either from the dropdown "allow" menu. One day, I was no longer able to select my webcam. I could only select the obs virtual camera. I switched to MS Edge which worked as normal. I've uninstalled OBS and all plug-ins. Same result I've reinstalled firefox. Same result. I've been using MS Edge for websites that need my camera.

I tried to login to firefox sync on a different system due to repair. My entire data is gone and all passwords are also gone. What to do.

I even tried login with username and password apart from google sync. It still didn't worked.

My customer has a problem since about a month on Firefox (using it on a Terminal Server). The top of Firefox gets hidden by white and grey "bar" and he can not even use the "functions" of buttons behind that. -> Please see attached Print screens Lower part of the Favorites-bar is visible and also works if he clicks on it - everything above not visible and does not work for clicking.

The problem only comes up from time to time maybe once or twice a week. When he minimizes Firefox the application behind is visible normally. when he maximizes it again, same problem still visible in Firefox. When he closes RDP Session and reconnects - the problem disappears. When he turns off the monitor where Firefox is visible - Firefox gets move over to the other monitor and the problem disappears.

I am not 100% sure if this is a Firefox problem or Remote Desktop Problem (or maybe an add-in problem). But until now it only happened on Firefox!

He is always on the last recent version of Firefox, we just updated today to the latest version again - but I can not say yet, if the problem would still exist on the latest version from today.

When I close firefox while it's in full screen, turn off my laptop, and then open it again the day after, it opens in the small screen for some reason. I tried going to the root directory in the about:profiles section of the more troubleshooting information section and renaming xulstore.json to xulstore.json.old, and each time it worked for a few days and then it just installed a new xulstore.json and went back to opening in the small screen. This is really annoying and I don't want to switch it manually every time.

When trying to install any extensions on either the Mozilla Addons website or directly via the Extension settings, it fails to do so.

I've attached a screenshot of the Mozilla Addons website when it fails to install the extension. On some other addons that I've attempted in the past, it just shows the throbber forever.

I have checked the Multiprocess Browser Console and it says that it fails to move the file because it's locked (NS_ERROR_FILE_IS_LOCKED). I have also attached a screenshot of that.

Hey, so, I've seen this question a couple times when I searched, but (a) there didn't seem to be any solution and (b) they were all regarding Macs and I'm on Windows 11 v 23H2. I keep getting bubbles saying that Firefox wasn't able to check for updates- not that it couldn't download or install updates, but it couldn't search for one. I also did the "about Firefox" thing and it gives me the same message. Both of these have been going on for a couple days and I have attempted restarting Firefox multiple times and did a manual update [125.0.1 (64-bit)] just in case there was a problem there. Now, I've tried the tips from the other threads (turning off the proxy, checking any anti-update policies, and checking the add.update.url in the config settings) with no luck. So in an effort to either bump the question or get any Windows oriented answers... Thanks muchly

When I launch teams or slack from firefox on windows, I presume that a slack:// and teams:// or equivalent url is launched by the webpage.

As a developer working on Browser Picker, it would be quite handy if I could inspect these urls that gets launched, is there a way I can see the actual protocol url that got launched somewhere?

Two issues here I cannot update FF to latest version get the "failed to update" in the about section. Near as I can tell I think the problem is related to Nord VPN threat scanner? It is the last extension I installed, soo..

Oh and Windows 11 Pro X64 bit latest and greatest updates.

Also when downloading a new version there are variations in the downloaded file content. Never the same download twice different SHa and what not.

Also why does Mozilla not include an entire version with the download instead of the current method of downloading an installer, and then finally install with the FF downloader file?

Hi! On the latest version Mozilla Firefox 125.0.1 when i download .docx files i get the message 'File not downloaded: Potential security risk.' I select Allow download and the file downloaded can't be opened.

Thanks!

I just got a chromebook! Details:

Device name: Lenovo Flex 3 12.2" chromebook, 8GB ram. Intel N100 Device code name: IP Flex 3 CB 12 (pujjo, version 123.15786.0) Firefox version: 124.0.2 (flatpak) OS version: Version 123.0.6312.112 (Official Build) (64-bit) Chrome: Version 123.0.6312.112 (Official Build) (64-bit)

When I watch a youtube video with chrome my cpu usage is 20-30% When I do the same with firefox my cpu usage is 50%

Running `about:support` and going into `webrender_compositor` I get the following errors under `env`: 1. Blocklisted by gfxInfo 2. Blocklisted; failure code 3. FEATURE_FAILURE_WEBRENDER_COMPOSITOR_DISABLED

I have set almost all these force renders = True and even granted gpu access to firefox flathub but still no difference in performance. I am asking now because I am just going in circles in the rabbit hole.

Prior to about a month ago, downloading worked as expected: - click a link - the save to... dialog opened - choose the folder - the download is off and running

No more. For about the past month - click a link - wait for a long time with FF frozen - the a wheel starts rotating - after a full minute (or more) the save dialog appears.

Something has been broken in the mad-dash to push updates. It's fine for browsing, but the, you need to download. At that point you wish you were using a different browser (any other browser, in fact) since FF is the only oe that has this problem. Downloading works fine in a 8 chromium browsers that I have and in the 5 FF clones (like Waterfox)

It's just FF that's broken. I can no longer afford to set it as default because of this. The others are not perfect (WF won't activate Pocket, foe example) but downloading promptly is critical.

HI, I'm trying to move the text to below the picture as in the screenshot of the popup (black back ground) on the non-popup pages because the mobile is not in popup, and the text is blocking the artwork as well. Is there a section to move the text outside of the picture? Thank you!

I am having a new (to me) problem logging in to Flickr using Firefox on my laptop (running Windows). After supplying the requested email and password at log in, I was prompted to enter a verification code that was sent to my account email address. After promptly entering the verification code, I was returned to the original log in page. There was no error message to indicate that either the address, password, or verification code were incorrect or that anything else had gone awry. I was simply not logged in. I repeated this process a few more times with no change.

Then I tried two other browsers (same laptop) and logged in sucessfully without even having a prompt for verification code from Flickr. I also have access to the account through the Flickr app on my phone. I am not sure then what Flickr is encountering with Firefox in particular. Any suggestions? Thank you.

My Firefox recently updated to version 124.0.2. Afterwards my taskbar shortcut broke, so I pinned a new one manually (right-clicked Firefox in start menu > open file location.) When I opened Firefox it had reset the primary profile to be default, so I changed it back to my BetterFox profile. Since then I've run into several oddities, such as Firefox crashing when it's running in the background, getting an error saying "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window," when I try to open it, invisible shortcuts in my taskbar(see image) and my bookmark visibility resetting from always to only in new tab every time I start up Firefox. Please help me.

Hello,

I need your help because i can't find solution to problem. On my macbooks air m1 i experience a very annoying thing: Often while i'm scrolling on websites smooth scroll animation get choppy/sluggish for few moments and lagging. It's like animation is FPS dropping during the scroll. I tried lot of things on both device:

- tried without extensions - created new profiles - use without syncing data - disabling hardware acceleration (gets worst) - disable smooth scroll in settings (get worst) - completely remove firefox with AppCleaner and reinstall it - Reinstall macOS and just install firefox alone. I tried latest Ventura and Sonoma

I don't have clue why this happening but ruin user experience very bad. With Safari everything is fine and smooth. On my wife's device (macbook air m3) have same issue.

Do you have any idea how can i fix it?

For some time now, Firefox has been unable to display quotes on Yahoo Finance; for example:

https://finance.yahoo.com/quote/MSFT/

The space where the price history graph for MSFT should be is blank except for a message saying "Loading chart for MSFT". The chart never loads. Sometimes Firefox issues a message saying that the site is "slowing down Firefox".

This happens for *any* quote, no matter what the ticker symbol.

I have tried running Firefox with a new profile, running in a private window, and running in Troubleshooting mode; the behavior remains the same. Clearing cookies and changing the tracking protection setting has no effect.

Oddly enough, when I attempted to report this page as not working, I couldn't submit my report (the Send button did nothing -- though this feature works for other sites).

Have others here experienced the same problem; and if so, is there a known cause/resolution?

Thanks in advance for any help.