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I’ve been taking a look at the latest updates regarding the new Firefox design rolling out in Nightly, and while I appreciate the ongoing work and the return of features like Compact Mode, I wanted to share some thoughts from a user perspective, particularly regarding the aesthetic changes.

Personally, I’m not a big fan of heavily rounded edges across tabs and UI elements. For my workflow and visual preference, I much prefer a cleaner, sharper, and more traditional layout.

With these UI evolutions coming down the pipeline, it would be fantastic if Mozilla could provide a built-in option or setting to keep the current/classic style intact while still receiving all the important under-the-hood updates, security patches, and features. Giving users the flexibility to choose between the new design language and a more traditional layout would ensure everyone can tailor Firefox to their exact liking.

Would love to hear how others feel about the new look and whether a classic style toggle would be a welcome addition for you too!

I've recently set up Thunderbird on Linux Mint 22.2 and was unable to sign into Yahoo so I tried to sign in with Firefox instead and had the same errors :-

   Something went wrong
   We could not sign you in. Try again from a different device.

OR

   We couldn’t sign you in
   Change your browser settings to continue. Try the following:
   Turn off ad blockers
   Enable JavaScript

If you still can’t sign in, try a different device.

I can sign in with Chrome without any problems on the same workstation. Firefox version :- 147.0.4 (64-bit)

   Only Extension is Privacy Badger, but this is disabled for Yahoo.com

Thunderbird version :- 148.0 (64-bit)

   No extensions - as installed from Thunderbird download site

I'm not having any issues signing into any other websites / email accounts (Google, Hotmail).

I notice on the support website :- https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo it says "Starting with version 148, Thunderbird is switching to a more secure authorization protocol PKCE for Yahoo" BUT this isn't offered in the list of Authentication methods, has PKCE been delayed? Currently using OAuth2 for Thunderbird

I deleted a profile not knowing it would delete everything I had. How can I undo it? I didn't want Firefox Profiles, it was forced. I deleted it, and everything just got deleted. Can someone please help revert this? Thanks.

There must be a way to turn off this popup off. This is REALLY annoying when it covers a password box and to remove it i must click outside it and I lose focus on the password box. If you must put he box there then at least leave the first part of the password box clear so I cab click on it and not have to click again to get the focus back.

I play https://crazyshooters.com/ and https://crazyshooters2.com/ a lot! But the game became laggy since Firefox 148 and my ping spikes up. Other browsers play fine. I am on Linux Mint if that helps. (147 and below run fine)

I don't know if this ever worked in FF, since I've been on Chrome a while. I tried canvas.toBlob() in FF without a solution.

The behavior is the same whether the served image is jpg or webp. A Servlet delivers the image data, here in webp:

          response.setHeader("Content-Type", "image/webp");

On page, I use a canvas thus => see '// FIREFOX'

     var canvas = document.createElement( 'canvas' );
     canvas.width = width;
     canvas.height = avail_height;
     var context = canvas.getContext( '2d' );
     context.drawImage( imgsrc, 0, 0, width, avail_height);
     context.lineWidth = 150;

     // FIREFOX: canvas.toDataURL('image/jpeg')=black, png,webp,default=transparent
     img.src = canvas.toDataURL('image/jpeg');

     img.onmousedown = disableDragging; // for FF
     img.style.opacity = "1.0";
     console.log('setImg ok');

Inspecting a black jpeg:

        data:image/jpeg;base64,...

Thanks!

I sent an email a few days ago asking for a refund and a few hours later changed my mind, I couldn't cancel the ticket (as far as I know) so I sent a follow up email to disregard the first email because I thought it would just be more hassle and I think the VPN works fine anyway. Today I get an email saying my subscription had been cancelled! which I could understand is my fault for being indecisive in the first place and the last email I sent might not of been read in time, but the email that I had received also didn't state I would get a refund and seemed like an email I would get if I had cancelled my subscription myself stating "We’ve cancelled your Mozilla VPN subscription. Your final payment of US$59.88 was paid on 14/07/2026" Should I still expect to get a refund or was there an error with my request?

I want to migrate everything from windows to linux, i've already synchronised browsers on both systems, but settings on linux didn't get overrided.

How can i make browser on linux exactly the same as on windows (including settingd)?

An e-banking site that worked in Firefox for years no longer works in 145.0 under Ubuntu Studio 24.04.1 This is the help page for the error I am receiving: https://support.mozilla.org/1/firefox/145.0/WINNT/en-US/connection-not-secure However, the error message I received (see attached image) is not listed there. Since the e-banking site hasn't changed in ages, I suspect instead something in one of the recent Firefox updates. The site works fine in Safari under Sequoia 15.5 on a MacBook Air, and I can login in Firefox, so I doubt that there is a problem with the site's security certificate. Since both the MacBook Air and the Ubuntu PC are on the same LAN, I also doubt any network obstruction. I haven't found a wax to get any more detailed error information and would be grateful for tips on how to do so. Meanwhile, I would like to at least change from the standart Firefox release to the ESR veersion, but find no information on how to do so. I have currently set up Firefox to be pulled from the instructions in https://support.mozilla.org/en-US/kb/install-firefox-linux#w_install-firefox-deb-package-for-debian-based-distributions-recommended under "For Debian Trixie and Newer" How can I switch from my current Firefox under Ubuntu to an ESR release?

I am on endeavourOS (linux). Whenever I try to upload images for a profile picture to sites like youtube or X, the image becomes corrupted and doesn't upload correctly. It did this with whatsapp too and I had to use a separate app for it. Other posts said that disabling "privacy.resistFingerprinting" would fix it, but it's already disabled.

Attached below are an example of this bug and the contents of this image when viewed on a text editor.

Greetings.

I am using an old Linux Mint version. I got messages that my Firefox needed to be updated.

I finally figured out how to do that and updated it. I started to use it. No problems.

However, the update did not change the default Firefox in the menu or on the taskbar panel below. If I click on them, I get the old version.

So when I restarted the computer, when I clicked on the Firefox shortcut icon in the lower taskbar I got the old version with the tabs that were on it. I had to go back into the Firefox file downloaded for the update in order to open the new version.

So, how do I get a working shortcut icon for the new version and get rid of the old version/icon?

Thanks.

David

bold textI have finally installed Debian 13, Trixie, into my computer. However, I don't seem to have attached to the Debian Mirror. How can I do that?

Hello,

I have today encountered a reproducible issue with Firefox 145.0.2 (64-bit) on my system (CachyOS Linux). Whenever I press the "Print" button in the printing dialog for a PDF file, the browser freezes and no longer reacts to anything. I had to kill the process manually and try again. I have then downloaded the PDF and opened a different application to print it - that worked fine. Is this a known issue with Firefox? Does anyone have an idea how to fix this?

I already tried resetting the printer settings in the browser, but that did not change anything.

Thanks, Stefan

Trying to not just edit a PDF in Firefox on Linux but actually edit the document using its Dynamic-XFA format elements of that PDF. XFA is an Adobe proprietary format that they depreciated several years ago but it still works in Adobe Acrobat Free. (I use a Windows guest VM for this as a workaround for now but I'd rather not since it takes extra resources and time). Elements can be filled in FF and some menu drop downs work in FF but other dynamic XFA element buttons don't respond like the one I attached.

In Acrobat the "X" and "Add Contact" buttons will add or remove some elements to the document.

Can this be done in FF desktop?

Version 151.0.1 (64 bit) on desktop PC.

In about:config I know there are a lot of options to modify under the search term "pdfjs" but I don't know what element would allow this to possibly work if its supported.

I wish I had other better options but government documents are what they are.

I want to navigate on search results using the keyboard. I could use tab but it suggests all interactive elements such as news, images, books, videos, search settings and etc one by one. I want to press something and make active first result, then second. If such hotkeys are not provided, maybe there are any extensions with similar functionality?

In 2024-25 Microsoft Edge gained the ability to limit the usage of physical RAM that the processes uses. Once that limit is reached tabs are put to sleep or are unloaded. So a user of Microsoft Edge could restrict the memory usage to say 1GB or 2GB or 3GB and so on till the maximum available physical RAM.

Does Firefox have such an ability? Is there some flag or settings in about:config that can be enabled for a similar feature to be used? Does Firefox have ability to put tabs to sleep once SWAP is started to be used? Is there some flag or settings in about:config that can be enabled for a similar feature to be used?

If none of one of the above is not available with Firefox then will Firefox add this feature as part of the browser in the future?

Firefox is disconnecting my account every time i restart the browser. I've made sure it's not set to clear data when restarting. I found a support forum post for mac where they weren't installing it and were running it from the dmg, but i'm using the firefox that was installed during cachy installation, which firefox gives /usr/bin/firefox, when runnign it from terminal (or anywhere) the command in btop is /usr/lib/firefox/firefox. its really frustrating because i lose my session data, have to log back in again, have to redownload all my extensions, ahve to reconfigure all my extensions every time the browser restarts

I'm on CachyOS on COSMIC de with a btrfs file system. I've tried uninstalling and reinstalling firefox. I've tried making a new profile. I really don't want to use a different browser, but this isn't functional.

Hi all. I have been using firefox with ubuntu 22.04 for about since when ubuntu 22.04 was released (2022).

On firefox, I usually use the nordpass and tab grouping extensions. For the third or fourth time in a row, firefox has simply vanished from my system from day to night.

I click the icon and nothing happens. I try typing "firefox" in the terminal and get

   Command '/usr/bin/firefox' requires the firefox snap to be installed.
   Please install it with:

   snap install firefox

Even if I accept the bizarreness of snap simply deciding from one day to another that I don't have this package (or did I never have it and never needed it in the first place?) and try "snap install firefox" I get:

   snap "firefox" is already installed, see 'snap help refresh'

After reading the result of "snap refresh help" I decided to "snap refresh" to update all of it's packages. Still, "snap install firefox" and "firefox" keep giving me the same result.

What is happening here?

When I try to run firefox 141.0 (Linux x64) I get:

libxul.so: undefined symbol: gdk_wayland_device_get_wl_seat Couldn't load XPCOM.

Is there a way to fix this?

I'm using Slackware 14.2.

Firefox worked this morning, but stopped in the afternoon. I ran an update, but could not connect to my gmail account anymore, or listen to the Radio France podcasts All this works from Google Chrome (not my default browser). All under the Mozilla VPN 2001:4860:7:150e::fc (why the IPv6 address?)

Firefox 148.0 (20260216153405) Details Installed on: 26 February 2026 at 18:55:57 Status: The Update was successfully installed

~> uptime

21:59:01 up  1:22,  1 user,  load average: 0.47, 0.38, 0.32

~> uname -a Linux tanya 6.8.0-101-generic #101-Ubuntu SMP PREEMPT_DYNAMIC Mon Feb 9 10:15:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux ~> cat /etc/os-release PRETTY_NAME="Ubuntu 24.04.4 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04.4 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" UBUNTU_CODENAME=noble LOGO=ubuntu-logo

Thanks, Marc