this post was submitted on 11 Oct 2025
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Sorry, but this isn't something Google could do anything about, even if you were able to contact them. Firefox isn't based on Chrome, it's based in their own Gecko engine. You could try to message Firefox though about it.
(if you are wondering, Firefox is based on the Gecko engine. https://firefox-source-docs.mozilla.org/overview/gecko.html
The header is parsed incorrectly on Google servers and return html in the wrong language. It's google, f-droid , gitlab and many others that have to fix the parsing bug, which is very unlikely
At the beginning of your post, you wrote that "This does not happen with any other chromium based browser". This would indicate that it's a unique problem to Firefox and would in turn be a Gecko engine issue. Now, if this was an issue with other browsers, then I'd agree with you.
After investigating, it's because chromium browsers don't send "zh-Hans-CN" in the request header and it turns out that many server side language detection implementations are buggy.
So, it's not technically a Firefox bug, but, considering the minuscule share of people that are
It's extremely unlikely that hundreds of separate website owners will fix their implementation
I'm guessing the people with this issue are in the orders of dozens, not thousands