Mastodawn

It’s amazing to me how broken Threads is in Firefox, while it renders fine in Chrome. The Firefox console seems to indicate the problem is due to CORS violations blocking JS from loading, so now I’m not sure if I should be mad at the Threads development team or lax security policies in Chrome.

(Yes, yes, I’m aware you all have why-not-both and road-to-el-dorado-both memes at the ready.)

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Faraiwe 1d ago

@Meyerweb ::aborts fire::

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theAdhocracy 1d ago

@Meyerweb You've probably already covered this, but just in case: this isn't Firefox's Meta/Facebook Container kicking in too aggressively? I've never tried to use Threads, but I do occasionally try to look at something on Instagram, and have to remind myself that the Container is running and sometimes blocks functionality.

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Dan Veditz 1d ago

@Meyerweb is it https://bugzilla.mozilla.org/show_bug.cgi?id=1996509 ?

doesn't sound quite right, but we don't know why some people see 1996509 and others don't. yours might be similarly mysterious.

I assume you tried the obvious diagnostic culprits: disabling tracking protection and add-ons to see if they are involved

1996509 - Facebook is stuck on its splash screen and doesn't proceed to load. Same thing is happening to Threads.

REOPENED (nobody) in Web Compatibility - Site Reports. Last updated 2026-03-25.