Forum der Gemeinschaft Firefox

I've always used Firefox as my default browser, it's been updated and is the current version. Recently I have noticed that pages are slow loading and some images on the page never load properly and remain blank. More vexing, is that Gmail has become very unstable in Firefox and won't load properly, loads slowly and freezes blanks out when I try to delete trash or spam, etc. It's annoying as more and more I have to open up Edge Browser to get performance on the websites that are failing in Firefox. This includes various websites that I use for work where logins are glitchy and unstable in Firefox, but work in Edge? Disappointing as I prefer to use Firefox, but even with recent upgrades installed it seems to work less well than in the past.

I have logged into TinyURL.com MANY times using Firefox. Now, I get a Cloudflare Validation Error when trying to do so (see attached screenshot/snip).

This was done in Troubleshooting mode, but is the same in standard mode, though I have no extensions enabled. I've tried turning Protection Tracking off; no luck. - We use ZoneAlarm, but the Web Secure functions are all disabled. - I have the same issue on 2 PC's, one Windows 10 and the other Windows 11, 64-bit. - I'm on FF release 150.0.2 - 64-bit, and both Windows installs are fully updated and kept that way. - I've reached out to TinyURL in hopes of resolving the issue. They suggested many of the above steps but not resolved this issue. - HOWEVER, I've found that login via Google Chrome IS seamless - no issues.

What is it with Firefox that it's having issues with the Cloudflare "Human" check? I've checked the Cloudflare site; all conditions are good, and this very setup passed the "Turnstile" check.

FF is my #1 preferred browser, so please look into this. I see that others have posted similar issues over multiple years here (but a search of support articles didn't find one . . .)

Thanks,

I am a loyal firefox user and have used it for years. Security and features are great. I use Google docs constantly throughout the workday on my Mac and I am constantly having problems with Firefox. Google docs that I work in are constantly re-loading, incompletely downloading, going offline. I typically have 5-10 docs across the platform open at a time, and the problems are preventing me from working effectively. I have tried searching help forums and done the fixes suggested (repeatedly clearing cookies and cache, turning off protections, etc). Nothing works. Any ideas before I switch the Chrome (yuck)?

Bonjour,

Depuis le 4 août à 14h30, Google Meet ne parvient plus à accéder à la caméra de mon ordinateur portable lorsque j’utilise Firefox ou Chrome. Un message me demande d’autoriser l’accès à la caméra dans Windows, mais les autorisations sont bien activées.

Il est important de préciser que Google Meet fonctionne parfaitement avec Microsoft Edge, avec la même caméra et sur le même ordinateur et que Teams fonctionne avec Firefox.

Par ailleurs, jusqu’au 4 août à 9h30, Google Meet fonctionnait normalement avec Firefox et avait bien accès à ma caméra.

Il semble donc qu’une mise à jour effectuée entre ces deux horaires, soit de Google Meet, soit de Windows 11 (version 25H2), ait pu modifier ou bloquer l’accès à la caméra pour Firefox et Chrome.

Actuellement, je suis donc obligé d’utiliser Teams pour faire mes réunions.

Pourriez-vous m’indiquer comment résoudre ce problème et, si possible, vérifier s’il s’agit d’un problème connu lié à une récente mise à jour ?

Je vous remercie par avance pour votre aide.

Cordialement,

Dominique Turpin

Hi Mozilla Support Team,

We are experiencing a minor layout rendering issue on our online booking platform bookbustour when accessed via Firefox for Desktop.

Are there any specific Firefox CSS compatibility rules or extension settings we should adjust to optimize user performance?

Thanks for your assistance!

I have reproduced a persistent Firefox/Linux emoji rendering issue in ChatGPT and found a small CSS workaround that fixes it.

Environment

Linux Firefox 155.0.1 The problem also reproduces in a completely fresh Firefox profile Noto Color Emoji is installed

Symptoms

In normal ChatGPT conversation text, some common emoji such as:

😄 😂 😀 😁 🙂 😊 🤣 ✅

render as monochrome or outline glyphs.

Other emoji such as:

🚀 🔥 ❤

may render correctly in the same message.

A particularly useful clue is that the same affected emoji render correctly inside ChatGPT code/copy boxes, while failing in ordinary response body text.

Firefox DevTools Fonts inspection showed ordinary fallback fonts including DejaVu Sans, FreeSans and Nimbus Sans being used alongside Noto Color Emoji.

Updating Firefox from 155.0 to 155.0.1 did not fix it, and neither did creating a completely fresh Firefox profile.

Diagnostic test

Running this in Firefox DevTools Console on chatgpt.com immediately fixes the affected emoji throughout the page:

document.documentElement.style.setProperty(

 "font-variant-emoji",
 "emoji",
 "important"

)

Permanent workaround

Using the Stylus extension, scoped only to chatgpt.com:

html {

   font-variant-emoji: emoji !important;

}

This survives a complete Firefox restart.

This appears to be a font/emoji-presentation interaction where some emoji-capable Unicode characters are being satisfied by ordinary monochrome text fonts before the colour emoji font is selected.

Mozilla Bug 1971053 describes closely related glyph-selection behaviour and mentions font-variant-emoji: emoji as a remedy: https://bugzilla.mozilla.org/show_bug.cgi?id=1971053

I am posting this both in case it helps other Linux/Firefox users and to ask whether this remaining behaviour on Firefox 155.0.1 is expected or should be tracked as a current Firefox/web-compatibility issue.

Hi!

We have a intranet site that works in Edge and Chrome without issues with the site added to "internet options". But for some reason we are getting 401 Unauthorized when trying to access it from Firefox. I have tried adding the urls to: network.automatic-ntlm-auth.trusted-uris network.automatic-ntlm-auth.allow-proxies: true network.automatic-ntlm-auth.allow-non-fqdn: true network.auth.force-generic-ntlm: false network.auth.force-generic-ntlm-v1: false

Ingocnito mode , same error. I have tried disabling all plugins. Disabled DNS over HTTPS.

HTTP/1.1 401 Unauthorized Server: Microsoft-IIS/10.0 WWW-Authenticate: Negotiate X-Powered-By: ASP.NET Date: Mon, 25 May 2026 08:15:41 GMT Content-Length: 0

Regards Rasmus

Здравствуйте. Я установил сертификаты по инструкции, которая лежит на s.sber.ru/70VQ2B . После этого в мозилле не прогружается полностью окно входа на online.sberbank.ru, не видно содержимого фреймов (сейчас попробую сделать скриншот). В Microsoft Edge работа нормальная. Удаление сертификатов, перезапуск браузера и компьютера не помогли. На других компьютерах ещё не проверял. Посоветуйте, пожалуйста, что можно сделать. Windows 10, Firefox 153.0.3 (64-разрядный).

Sites struggle to load a lot of the time now, sites like youtube don't load until I clear my browsing history and cookies, some sites don't load at all, some shops don't load any image previews. I've tried on other browsers when these things happen and they don't happen there.

I can't access two websites in Firefox, but I can access them on my phone and in other browsers. One site is Facebook, and the other is https://www.gildertech.com/forum/

Thanks in advance,

I have various sites that won't accept site login credentials but work on other browsers and Firefox is running very slow. If I completely shut down and restart my computer, the logins will work for a few minutes but then stop working again. I've completely uninstalled Firefox several times, deleted my profile and created a new profile. Ran Firefox in troubleshooting mode with extensions turned off. None of these have had any effect. I recently saw a post that this might be a Firefox issue with version 154.00. I'm currently running version 154.01. Is this actually a Firefox issue or do I need to continue to look further into my computer and router for the problem?

bei Ebay werden die angebote falsch angezeigt, zum bespiel kann ich nicht sehen da eis ein Preisvorschlag ist. nach löschen der cookies auf der seite ist die ansicht richtig und wenn ich mich eingeloogt habe ist wieder alles falsch, echt nervig.

My desktop Firefox (version 155.0.1) has recently became unable to consistently access the Web site at this Web site this Web site. Chrome successfully accesses the site 100% of the time. Firefox's connection failures are intermittent, unpredictable, and usually go away on their own after varying time intervals (sometimes can't connect for up to 24 hours). I see status messages saying Firefox is trying to connect to the site, but it eventually gives up and times out.

I cleared the Firefox cache, but that had no effect. I don't recall making any significant changes to the Firefox settings lately. Any suggestions on what to look at/try would be greatly appreciated.

(Yes, I know the site doesn't use https: Its protocol is outside my control).

Has anyone reported this before? I am working as a contractor for a BigTech company. I am using an online platform/tool of theirs for several years now but after a recent update the work area doesn't show scroll bars anymore. That means I cannot scroll the editor window and can't go beyond the first page. This makes working (and earning money) almost impossible. As even for the tiniest edit I have to download huge tasks which is extremely time-consuming. An inquiry with my manager there indicated that other contractors on firefox experience the same issue. so they consider it a firefox compatibility issue of some kind. They gave me the advice to use Chrome, Edge or Safri instead. Well, I use firefox because I do not want to use Chrome/Edge... Don't know about Safari but my PC is on Windows... Any idea what can cause it and how to resolve the issue?

For some reason, my Gmail page doesn't show the icons on top at all. Like the archive, mark as read, and the others on top of the mailbox contents. They show up on both Chrome and Edge, so this seems to be a Firefox problem.

Computer being used with issue: HP ProDesk 600 G2 DM (Windows 10, 16GB RAM) So can this be fixed or should I just use my phone for Gmail?

I am suddenly finding I cannot scroll a thread in Chatgpt! What changed in the last 2 days? It has been working fine for 2 years. I am on OS mojave 10.14.6 on a 2015 Model Imac.