ComfyUI Browser UI Keeps Crashing on Heavy Video Workflows, Author Migrated to Desktop
Suspicious_Pizza9529 · reddit · 2026-09-03
A heavy ComfyUI video-rendering user details why the browser interface crashes on complex node graphs: WebGL context limits, JS heap constraints, and Chrome tab sleeping kill batches even though the Python backend copes fine. Browser fixes (heap flags, splitting instances, fewer previews) weren't enough, so they rebuilt the pipeline in MiniMax Designs' desktop app with its native cloud agent and H3 backend. A useful field report on where the browser UI becomes the bottleneck.
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