Issues with model download when testing under origin trials

[Rishi Gorantala]

Hello folks! 

I have a Chrome extension that works fine with origin trials (chrome.aiOriginTrial) namespace API. However, before submitting updates to publish on Chrome store I wanted to test it out (i.e., trying to simulate experience of a new user) if it works without enabling the 2 flags. So I flipped the following two flags back to Default:

1. Prompt API for Gemini Nano
2. Enables optimization guide on device

I restarted by Chrome, and re-installed my extension unpacked to see if it works now, but the model is always stuck at 'after-download' as per console logs

I have the following code to log the progress but I see nothing in console:

const session = await chrome.aiOriginTrial.languageModel.create({
  monitor(m) {
    m.addEventListener("downloadprogress", e => {
      console.log(`Downloaded ${e.loaded} of ${e.total} bytes.`);
    });
  }
});

In order to ensure it's not an issue with my extension, I built and installed the sample from the team but I notice the same issue there.

I reinstalled Chrome, tried on Chrome Canary but have the same issue everywhere. The Optimization Guide On Device Model under Chrome://components says up-to-date. I have over 140 GB free space, and waited for a long time to see if there's any progress but no luck.

Versions:

Chrome: Version 131.0.6778.109 (Official Build) (arm64)

Chrome Canary: Version 133.0.6887.0 (Official Build) canary (arm64)

What am I missing? Or is it a bug? Thanks!

[Thomas Steiner]

Hi Rishi,

Could it be that you're on a slow network, or have enabled data saver mode? Also, the model won't download on metered connections, like when tethered to a phone. 

Cheers,

Tom

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[Rishi Gorantala]

Hi Thomas! It's my home wifi network -- the same one where I did all dev/tests and the model downloaded fine before.

Any way to force kick/offload the model to see if there's any edge case here? Thanks!

--

Regards,
-rishi

[Thomas Steiner]

Hey again,

Hmm, strange. And you said it worked fine before, right. Maybe file a Chrome bug with the exact steps you took and we can investigate. Thanks!

Cheers,

Tom

[Rishi Gorantala]

Done. 

Link: https://issues.chromium.org/issues/383521543

--

Regards,
-rishi

[Thomas Steiner]

Thank you. Added a few folks and triaged this to a closer component. 

Cheers,

Tom

[Rishi Gorantala]

Hi there! Just checking in to see if someone had a chance to look into this. Or is it safe to assume this will be looked into after holidays? Thanks!

[Mehrdad Gharibi]

I think the problem is because your network is slow

[Rishi Gorantala]

Mehrdad: Thanks! Checked for that already (details in thread above).