The emoji isn't rendering in this case either (FF 146 on macOS) but does in Safari.

FF 146 on Windows 11 appears to render the emojis as expected, so the issue could be limited to macOS.

Issue is still present on FF 146.0.1 on macOS. A good site for testing is https://getemoji.com/ . It just shows a bunch of empty boxes.

Even the Firefox settings pages (about:preferences) does not render the emoji after checking for updates. Included screenshots for FF 146.X on macOS (issue) and FF 146.X on Windows 11 (working)

It's being analyzed under bug 2005440. You can find same workarounds there.

It's being analyzed under bug 2005440. You can find same workarounds there.

I do use Lockdown Mode, so this must be it. Glad to see that it's a known issue that will be fixed at some point soon. Thanks for linking!

It doesn't look like this issue is being prioritized. Here's the workaround I grabbed from the linked bug, since it's much better than fully disabling Lockdown Mode.

1. Open about:config
2. Search for security.sandbox.gpu.level
3. Set the value to 0
4. Restart Firefox