I-Firefox Community Forum

Or is the only option - as a web developer, to make duplicate css flags?

I.e: https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/::-webkit-slider-runnable-track & https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/::-webkit-slider-thumb Where firefox supports the behavior, but under different flag names https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/::-moz-range-thumb & https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/::-moz-range-track

Im also looking for recommendations on barebones/simple parsers that can help make my html/css/js more compatible without messing up the code too much. Im hoping to avoid having to use a build system.

Thank you

Just the last couple of days I can no longer browse through the images of an ebay item. the first image loads but the arrows or the thumbnails yield no movement, and I can't use the contact seller button either. No other website is effected, I am using the latest Firefox with Ventura on an imac. It all works if I use Duck duck and go? All very strange. Tim

I am on iMac Tahoe 26.5.1. I cannot use Netflix, or HBO Max. Both say that my brower is out of date. My sofware indicates that my Firefox is the *latest version available. Please advise.

I am using win 7 ultimate, with fire fox 115.32.1 ESR,. The LinkedIn main window gets squished to top left corner in a small square, other pages open up normally. Internet archive site does not sign me in as the blue button of sign-in doesn't function. I can't change pass words nor sign-in. Website Cell Press opens research papers in a single verticle line in left corner, downloaded pdf papers open normally. Other browsers like Comodo and Chrome do not cause such issues.

I want to be able to make voice and video calls via facebook messenger using my PC camera and microphone but, the message I get is that "voice and video are not supported on this browser (Firefox/Mozilla) . It is supported on other browsers. I really don't want to switch browsers, I love firefox. I did find a couple possible fixes via advanced WebRTC settings but everything seems fine, i.e. it is clicked on true not false. I need this soon, can we get settings changed?

firefox is keeping me from accessing certain sites. why. do i need to switch to safari to access the sites. they do load on safari. can it be fixed or do i need to change?

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.

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?

While playing chess at lichess.org, browser power management inhibit messaging to the system gets stuck on its current status. That is, if power management is inhibited by media playing on another tab while I play a game, it will get stuck in the inhibited state. If power management is uninhibited while I play (no media playing), it will get stuck in the uninhibited state. This persists until the browser is restarted even if all tabs are closed.

I don't believe it to be a system issue, as the problem clears as soon as the browser is closed. Chrome based browsers do not exhibit the behavior for me, but I tried a Firefox fork (LibreWolf) and it has the same issue. I don't experience this issue at any other website I visit.

Only certain areas of lichess.org cause this behavior, primarily playing a game against a human opponent. I tried progressively blocking media and script requests to narrow down offenders, but I always break site functionality before I can pinpoint anything.

I'm not so much looking for a solution (although that would be great) as I am troubleshooting advice. Is there any way to narrow down exactly what it is about this specific website that is causing the issue?

Ho molti problemi da circa tre giorni. Quando apro alcune pagine, a volte si verificano problemi di rendering e la parte grafica del sito non viene caricata correttamente. La pagina appare completamente grigia, ma in realtà è caricata — se clicco a caso sullo schermo vedo che i link reagiscono, quindi la pagina risponde anche se non viene disegnata correttamente.

Su X e Twitch questo succede spesso. Con Twitch, mentre sto guardando una live, se parte una pubblicità oppure cambio stream, lo schermo diventa completamente nero. Quando succede, viene coinvolto tutto il browser — anche se ho più schede aperte sui miei due monitor. Anche i pulsanti della finestra in alto (minimizza, massimizza, chiudi) cambiano stile e sembrano quelli del vecchio Internet Explorer.

Se avvio Firefox in modalità risoluzione dei problemi, X si apre correttamente, ma Twitch continua ad avere lo stesso problema di schermo nero durante gli stream.

Ecco cosa ho già provato:

cancellare cookie e cache

disabilitare tutte le estensioni

disattivare e riattivare l’accelerazione hardware

usare la modalità risoluzione dei problemi

provare altre soluzioni trovate online

Nessuna di queste soluzioni ha funzionato finora.

Ho un monitor 2K a 360 Hz e un monitor 1080p classico a 60 Hz GPU serie 5060 Ryzen 7 7800X3D 32 GB di RAM

How do you avoid/deal with Firefox website incompatibilities? This happened on consecutive visits to two different websites today before I posted here.

In the first one, I disabled Ublock, cleared cache and cookies, and the site loaded, I then enabled Ublock with no error prompted.

Then I got a tab crash on Youtube. I wouldn't call tab crashes a daily occurrence for me, but I'm accustomed to them

Gmail tab crash just now. It just happened now with another website tab crash. i'm reverting back to 147.01

Is there any way to get the root of this. The only recent changes I can think of are browser (147.0.2 yesterday) and addon updates. Should I post my list of addons?

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.

I’m seeing a layout and font spacing issue in Firefox that doesn’t appear in Chrome or Edge. The page loads, but some elements shift after render and text spacing looks off.

I’ve tested in a private window, disabled extensions, and cleared cache, so it doesn’t seem profile-related. Any suggestions on what Firefox settings or DevTools checks might help?

Page where the issue is reproducible: dbrosmenu.com Thanks.

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.

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