Firefox Community Forum

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 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 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!

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

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

We use the Deepl site for translations and it won't load in Firefox without asking the "verify you are human" questions every single time. The Deeple site does not require this authentication in Chrome but we hate Chrome and want to stick with Firefox. We just have the standard security settings in Firefox, only use Windows Firewall and our Express VPN is not switched on; our IP location is showing correctly. Firefox is up to date.

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I am a student at WGU and have been using edge for browsing. I am having trouble logging in to my coursework, everyday. I hope this browser is the solution. please help me.