Codex found the root cause:

> The site’s graph incorrectly uses 32 texture bindings, exceeding its WebGPU device’s limit of 16. > Firefox 153 mishandles that failed rendering operation and leaves the compositor waiting

So a firefox + website bug

With an updated firefox, the website works except the mindmap on the top right

> Uncaptured WebGPU error: Too many bindings of type SampledTextures in Stage ShaderStages(FRAGMENT), limit is 16, count was 32. Check the limit `max_sampled_textures_per_shader_stage` passed to `Adapter::request_device`