Copper Contributor

Apr 26, 2026

Web Speech API not working in Edge v. 147

Hello, The JavaScript Web Speech API is not working with speech recognition in Edge v. 147 for multiple users in Spain, Italy and Turkey. This has been a problem since at least April 22, 2026. Can y...

Microsoft

May 19, 2026

Hi Everyone! Our developers are investigating and need some additional information. If you are able, can you provide the following?

1. Navigate to edge://metrics-internals/#variations and provide the values for SpeechNetworkStack and CFRSpeechServiceProtectECS experiments. It is possible you will not have these but if you do, it will look something like this:

"SpeechNetworkStack": {
            "enableFeatures": [
                "msSpeechRecognitionChromiumNetworkStack"
            ]
        },
        "CFRSpeechServiceProtectECS": {
            "enableFeatures": [
                "msSpeechSynthesisServiceUseCetoService",
                "msSpeechRecognitionServiceUseCetoService"
            ]
        },

2. After you see the failure, navigate to edge://histograms and provide the information under the following sections (they will all be right next to each other)

"Microsoft.SpeechRecognition.CancellationReason"
"Microsoft.SpeechRecognition.Error"
"Microsoft.SpeechRecognition.ErrorRate"
"Microsoft.SpeechRecognition.Event"
"Microsoft.SpeechRecognition.Method2"
"Microsoft.SpeechRecognition.SdkInstall"
"Microsoft.SpeechRecognition.WasRateLimited"

If you prefer, please feel free to send me a message with this information. Thanks!

-Kelly

jeffsbaker

Copper Contributor

May 28, 2026

Hello Kelly,

It has been working poorly for over a month now. Some days it worked for a few hours. But most days the speech recognition API gives a "network" error over and over again. Below is the information you requested:

edge://metrics-internals/#variations

There is not "SpeechNetworkStack" entry.

"CFRSpeechServiceProtectECS": {

"enableFeatures": [

"msSpeechSynthesisServiceUseCetoService",

"msSpeechRecognitionServiceUseCetoService"

]

edge://histograms/

- Histogram: Microsoft.SpeechRecognition.CancellationReason recorded 29 samples, mean = 0.8 (flags = 0x41) [#]

0 ------O (6 = 20.7%)

1 -----------------------O (23 = 79.3%) {20.7%}

2 ...

- Histogram: Microsoft.SpeechRecognition.Error recorded 35 samples, mean = 26.3 (flags = 0x41) [#]

0 ...

25 ------------O (12 = 34.3%) {0.0%}

26 O (0 = 0.0%) {34.3%}

27 -----------------------O (23 = 65.7%) {34.3%}

28 ...

- Histogram: Microsoft.SpeechRecognition.ErrorRate recorded 149 samples, mean = 2.6 (flags = 0x41) [#]

0 ------------------------------O (30 = 20.1%)

1 ------------------------------O (30 = 20.1%) {20.1%}

2 ------------------------------O (30 = 20.1%) {40.3%}

3 ------------------------------O (30 = 20.1%) {60.4%}

4 ...

7 -----------------------------O (29 = 19.5%) {80.5%}

8 ...

- Histogram: Microsoft.SpeechRecognition.Event recorded 75 samples, mean = 1.5 (flags = 0x41) [#]

0 ------------------------------O (30 = 40.0%)

1 ------------------------------O (30 = 40.0%) {40.0%}

2 --O (2 = 2.7%) {80.0%}

3 -O (1 = 1.3%) {82.7%}

4 ------O (6 = 8.0%) {84.0%}

5 ...

8 ------O (6 = 8.0%) {92.0%}

9 O (0 = 0.0%) {100.0%}

- Histogram: Microsoft.SpeechRecognition.Method2 recorded 66 samples, mean = 1.5 (flags = 0x41) [#]

0 ------------------------------O (30 = 45.5%)

1 ------O (6 = 9.1%) {45.5%}

2 O (0 = 0.0%) {54.5%}

3 ------------------------------O (30 = 45.5%) {54.5%}

4 O

- Histogram: Microsoft.SpeechRecognition.SdkInstall recorded 30 samples, mean = 1.0 (flags = 0x41) [#]

0 O (0 = 0.0%)

1 ------------------------------O (30 = 100.0%) {0.0%}

2 ...

- Histogram: Microsoft.SpeechRecognition.WasRateLimited recorded 30 samples, mean = 0.0 (flags = 0x41) [#]

0 ------------------------------O (30 = 100.0%)

1 ...

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Web Speech API not working in Edge v. 147