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[GH-ISSUE #3] WebGPU not supported in your current environment? #1

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opened 2026-10-15 13:27:57 +00:00 by bsakaguchi · 3 comments
bsakaguchi commented 2026-10-15 13:27:57 +00:00
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Originally created by @jtabox on GitHub (Nov 17, 2025).
Original GitHub issue: https://github.com/SillyTavern/Extension-WebLLM/issues/3

Hi, since about a week ago, WebLLLM has stopped working. Every time I try to test it, or some extension tries to use it, it shows an error message that WebGPU is not supported in the browser.

Image

Which isn't the case, I use the latest Chrome in Windows with an NVIDIA 3090 card. Also checking in webgpureport.org says that my browser supports WebGPU, so I assume it's WebLLM that doesn't see it?

Image

I've reinstalled it but it didn't make any difference.

Any suggestions would be greatly appreciated because I really don't know what I can do.

Originally created by @jtabox on GitHub (Nov 17, 2025). Original GitHub issue: https://github.com/SillyTavern/Extension-WebLLM/issues/3 Hi, since about a week ago, WebLLLM has stopped working. Every time I try to test it, or some extension tries to use it, it shows an error message that WebGPU is not supported in the browser. <img width="305" height="252" alt="Image" src="https://github.com/user-attachments/assets/2f5f0c76-67e4-4d0b-83dd-5f05eed56254" /> Which isn't the case, I use the latest Chrome in Windows with an NVIDIA 3090 card. Also checking in webgpureport.org says that my browser supports WebGPU, so I assume it's WebLLM that doesn't see it? <img width="368" height="588" alt="Image" src="https://github.com/user-attachments/assets/bd2ed576-833c-499a-9321-546d195d8902" /> I've reinstalled it but it didn't make any difference. Any suggestions would be greatly appreciated because I really don't know what I can do.
bsakaguchi commented 2026-10-15 13:27:58 +00:00
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@Cohee1207 commented on GitHub (Nov 17, 2025):

I've seen a recommendation to enable the "Force High Performance" flag in Chrome.

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<!-- gh-comment-id:3543632961 --> @Cohee1207 commented on GitHub (Nov 17, 2025): I've seen a recommendation to enable the "Force High Performance" flag in Chrome. <img width="946" height="317" alt="Image" src="https://github.com/user-attachments/assets/faa2e97e-02ec-41e1-a9ca-e6cb95d5a7f3" />
bsakaguchi commented 2026-10-15 13:27:58 +00:00
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@jtabox commented on GitHub (Nov 18, 2025):

I found the reason, though I'm not exactly sure how it matters, I guess some browser stupid security thing: My SillyTavern instance runs in a Docker container, and I configured it recently so that it is accessible from other devices in my LAN. But if I open SillyTavern's start page with http://10.0.10.1:8000 (my PC's LAN IP) from the same PC it runs, WebGPU won't work and throws the above error. If I open the same page, from the same browser but as localhost:8000, the problem disappears. Not sure what the connection is, but in any case the issue is resolved.

Thanks for replying :)

<!-- gh-comment-id:3549315781 --> @jtabox commented on GitHub (Nov 18, 2025): I found the reason, though I'm not exactly sure how it matters, I guess some browser stupid security thing: My SillyTavern instance runs in a Docker container, and I configured it recently so that it is accessible from other devices in my LAN. But if I open SillyTavern's start page with `http://10.0.10.1:8000` (my PC's LAN IP) from the same PC it runs, WebGPU won't work and throws the above error. If I open the same page, from the same browser but as `localhost:8000`, the problem disappears. Not sure what the connection is, but in any case the issue is resolved. Thanks for replying :)
bsakaguchi commented 2026-10-15 13:27:58 +00:00
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@Cohee1207 commented on GitHub (Nov 18, 2025):

Yeah, that's likely the case. WebGPU requires secure context: either localhost, or HTTPS.

<!-- gh-comment-id:3549331567 --> @Cohee1207 commented on GitHub (Nov 18, 2025): Yeah, that's likely the case. WebGPU requires secure context: either localhost, or HTTPS.
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