Φόρουμ κοινότητας «Firefox»

Dear Mozilla,

As a long-time Firefox user and evangelist, it saddens me that the time has come to part ways.

I have seen threads from others commenting on Firefox's aggressive memory consumption and retention. I have not measured this and thus do not feel qualified to comment, but, sadly, I am not surprised.

My own experience in recent times highlights 2 events that have driven me here.

1) Several websites just not responding in that some screens will not even scroll. This is fixed by me moving to a different browser.

2) More seriously - When trying to fill in a web form for a work job application the page was completely unresponsive. When I contacted the web site support their answer was: "Are you using Firefox? Ah, Yes, we are having issues with Firefox that we are trying to resolve. Our suggestion for the time being is, if practical, try using a different browser". That answer worked.

I should add that the usual cache clearing, machine restarts, even Firefox reinstall did nothing to fix either of the above issues.

So with the serious memory greed issues reported by others and my own (dys)functional experiences, I fear the time has come.

Thank you for the last 30 years or so and I am sorry it has come to this.

Best of luck in your future endeavours.

BTW - This post was entered using a different browser.

There seems to be a glitch that I keep encountering when trying to sign in through my TV provider, particularly Verizon, to watch DisneyNOW or TCM or any other service for that matter. The website known as "ssoauth.verizon.com" seems to keep hanging on the message "Please wait - we are verifying your account," and the sign in never gets completed. I already tried clearing my cache and history but with no result.

Even trying to submit troubleshooting information is causing the form to crash here. If you would like, I can send you a text file containing the log I saved from the browser console.

The website commonly used by Arizonans to make filings for court, will not work properly with Firefox, even after turning off Enhanced Tracking Protection. I had to use Chrome instead.

Hello everyone,

I’m experiencing ongoing problems with Firefox and hope to get some help or clarification here.

Main issue: I’m unable to sign in to my Outlook / Microsoft email account using Firefox. The login page does not load correctly, or the sign-in simply fails (Error 400). When I use another browser (for example Microsoft Edge), the login works without any issues.

System information:

Operating System: Windows 10 IoT Enterprise 2021 (LTSC, supported until 2032)

Firefox version: 147.0.3 (64-Bit)

Additional problems: Besides the Outlook login issue, Firefox has recently become more problematic during normal daily use:

Text selection with the mouse often does not work correctly

Clicking and dragging to highlight text is unreliable or stops working

Pages sometimes feel unresponsive, (ChatGPT)

Overall, the browser feels less stable than older Versions on Windows 10 22H2

These issues seem to be getting more frequent over time and occur on multiple websites, not just Outlook.

I switched my system to Windows 10 IoT Enterprise 2021 (LTSC, supported until 2032) in the hope of improved performance and stability.

What I have already tried:

Clearing cache and cookies

Disabling all add-ons/extensions

Testing in Private Browsing mode

Restarting Firefox

Unfortunately, none of these steps resolved the problems permanently.

My questions:

Is Firefox fully supported on Windows 10 IoT Enterprise 2021 / LTSC for the long term (until 2032)?

Are there known issues with Microsoft / Outlook sign-in specifically in Firefox?

Are there known stability issues (text selection, mouse interaction, page responsiveness) in recent Firefox versions?

What settings or troubleshooting steps are recommended to improve stability?

Thank you very much for your time and support.

Best regards, Marco Klecker

I need my gmail account but I cannot sign into it, it wants me to start a new one, but that will not do at all. I will wait for a week to see if you can rectify this problem.

Since a couple of days we get the announcement F1TV.formula1.com/nl/ is not compatible with this browser Use an other browser or hardware many Years there was no problem

I am running the latest firefox version 147.0.3 64-bit. Gmail opens and runs fine on duck duck go and brave. Cannot find any info on how to solve/fix/override/whatever on "numeric code 4" but seems like other folks experience, too. I appreciate your help.

hi i just install firefox and when I use messenger and put my cursor on camerra or phone I have the message voice- video call not available on this browser can you help?

I need to have a telecon from the provider meet.goto.com using Firefox on my PC running Linux Mint mint-001-1.0 147.0.1 (64 bit) but I get an error message browser not supported. What can I do? Thanks

The most recent update has caused an issue with LinkedIn. The problem only occurs with Firefox, not with Chrome or Edge. Do you know what it is? How to fix it? The profile photos are being overwritten with the name of the person and title.

Thank you for the prompt reply and I'm sending it back to English I have a problem with the yahoo.mail account. While I log in normally when I'm on google on mozilla I can't log in and while it accepts the passwords. He gives me an answer: " Technical problem. Right now we can't connect you try some other time " I spoke with help YAHHO . I did everything prescribed but nothing. It took me to the solution of the subscription. Can you help? Thank you

I have updated my firefox on W11 laptop to the latest version 147.0.3 (64-bit) but it cannot show any pictures from some, but not all, sites. Not from www.svt.se nor from www.yr.no But its ok from other sites, as www.tradera.com and www.kjell.com

It works fine using android firefox version 147.0.3

Any ideas, anyone?

Is there something changeable in Firefox that would allow things to display better? On Tue, Feb 3, 2026 at 11:27 AM Douglas Flegal <toemeister@hotmail.com> wrote:

   It shows up in Edge but not in my browser Firefox.

Answer: Thanks for flagging this. We’re aware that some parts of the newsletter may not display correctly in Firefox, while they do load in other browsers. Unfortunately, this is a browser-specific issue and not something we’re able to control on our end.

Summary: Uploading a file to a custom webapp with Chromium (Edge) works but consistently fails in Firefox. In Firefox the request is created, and times out. The server receives no file and logs “missing file.” The same webapp code is running on both Chromium and Firefox.

Environment:

• Next.js app (pages/api route)
• Endpoint: POST /api/file-upload
• Client: fetch(url, { method: "POST", body: FormData, credentials: "include" })
• Server: export const config = { api: { bodyParser: false } } + multipart parsing (formidable)
• Edge/Chromium: Version 141.0.3537.85
• Firefox Version 147.0.3 (64-bit)
• OS: Ubuntu 22 / Linux

Steps to reproduce:

1. Create a FormData object and append a local file:

  const fd = new FormData();
  fd.append("template", file, file.name);
  fetch(`/api/file-upload`, {
    method: "POST",
    body: fd,

1. In Edge/Chrome, upload succeeds. Server receives multipart body and parses the file. Actual behavior in Firefox:

• Transferred: 0 B
• No response status/body
• Client times out (Upload times out)
• File upload request received
• No bytes read server‑side.

Evidence:

• Edge request logs:
  • content-type: multipart/form-data; boundary=----WebKitFormBoundary...
  • bytesRead ~1.69MB
• Firefox request logs:
  • Transferred 0 B
  • File upload missing file field

Notes:

• Client FormData is valid; we log file.name and file.size right before fetch.
• There is a CSP report‑only warning (frame‑ancestors) when using a fallback iframe approach, but we are not using iframe in the failing case.

Question: Is there a known issue where Firefox blocks or fails to send and multipart/body can be stripped before it leaves the browser? Is there a recommended workaround that does not rely on browser sniffing?

Moderator note: This question has been edited to correct the formatting.