Azure AI Speech
An Azure service that integrates speech processing into apps and services.
2,064 questions
Connection to azure cognitive service failed with Firefox
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 66%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYA%3C/text%3E%3C/svg%3E)
Yan AI
15
Reputation points
based on Firefox 84, we have a voice-assistant app, it works fine until last Saturday（4.11）。
Azure API from https://learn.microsoft.com/en-us/azure/ai-services/speech-service/how-to-recognize-speech?pivots=programming-language-javascript
the api speechRecognizer.recognizeOnceAsync from Azure will create a web socket link with url like:
"wss://${region}.stt.speech.microsoft.com/speech/recognition/conversation/cognitiveservices/v1?language=${language}&format=detailed&Ocp-Apim-Subscription-Key=xxxxxxxxxxxxxxxxxx"
it has no response on Firefox 84,
will return 404 on Firefox 124,
return ok on Firefox 48.
works fine on Chrome
Azure AI Speech
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(99.2, 6%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAH%3C/text%3E%3C/svg%3E)
Amila Hapuarachchi 0 Reputation points2024-04-16T16:58:26.69+00:00 Same error occured "Firefox can’t establish a connection to the server at wss://eastus.stt.speech.microsoft.com/speech/recognition/conversation/cognitiveservices/v1"
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(195.2, 4%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVM%3C/text%3E%3C/svg%3E)
VasaviLankipalle-MSFT 18,676 Reputation points Moderator2024-04-16T18:55:27.28+00:00 Hello @Yan AI , Thanks for using Microsoft Q&A Platform.
Please allow sometime will check internally and get back to you on this. Meanwhile could you please respond with subscription details as requested in the private message?
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Yan AI 15 Reputation points
2024-04-17T01:45:02.95+00:00 @VasaviLankipalle-MSFT This is a 100% reproduction bug， which has seriously affected our commercial app。 and what is subscription details?
the original url including our app key, which is not convenient to share
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VasaviLankipalle-MSFT 18,676 Reputation points Moderator
2024-04-17T22:46:11.61+00:00 Hello @Yan AI , thank you for sharing the details. Please allow me sometime while I check internally.
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Yan AI 15 Reputation points
2024-04-18T06:30:30.81+00:00 @VasaviLankipalle-MSFT could you please kindly give me an approximate deadline?
could this be solved by end of this week?
it has negatively impacted our new product shipments and future considerations on out device by US Carriers.
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Yan AI 15 Reputation points
2024-04-18T06:32:18.4666667+00:00 @VasaviLankipalle-MSFT could you please kindly give me an approximate deadline?
could this be solved by end of this week?
it has negatively impacted our new product shipments and future considerations on out device by US Carriers.
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VasaviLankipalle-MSFT 18,676 Reputation points Moderator
2024-04-18T18:11:35.95+00:00 Hello @Yan AI , we can understand your concern. I have reported it to the product team, and they have acknowledged it.
Once we have more information on the fix/ETA, I will share it with you. Thank you for your patience.
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VasaviLankipalle-MSFT 18,676 Reputation points Moderator
2024-04-19T19:21:15.6566667+00:00 Hello @Yan AI , there is a similar issue related to this: [Bug]: Websocket 404 in Firefox · Issue #814 · microsoft/cognitive-services-speech-sdk-js (github.com) where a work around is offered in the commented link. In the meantime, you can try this and check if that helps you.
Here is the workaround, copied for your reference, from this issue:
I have encountered the same issue. This arises because the latest version of Firefox (124) has enabled the HTTP2 protocol by default for WebSocket connections. This change leads to a failure when connecting to the Azure Cognitive Service API, resulting in a 404 error as the servers are unable to process the request properly. The connection does not successfully upgrade to a WebSocket connection. To test this, ensure that the parameter 'network.http.http2.websockets' is set to 'true' in about:config. This is the new default setting which is causing the issue. It's important to note that previously installed versions of Firefox retain this setting as 'false', even after updates. For your information, this issue does not occur on Chrome on the same machine; it is specific to Firefox and is not related to subscription, authentication, or similar factors.
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VasaviLankipalle-MSFT 18,676 Reputation points Moderator
2024-04-22T20:07:35.3666667+00:00 -
Yan AI 15 Reputation points
2024-04-23T03:27:45.5233333+00:00 @VasaviLankipalle-MSFT the workaround is not working on my system. I am on Firefox 84
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Fauzan Ahmad 0 Reputation points2024-04-25T14:37:36.1733333+00:00 I am getting same error with firefox 125 version
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