Steam's web helper now runs its GPU work inside the browser process
(--in-process-gpu --no-zygote, #566). On the Mali bridge that browser stops
answering after its first window, Steam restarts it every 10 s and then quits
before the login page. Bridge sessions keep the stock process layout
(BL_WEBHELPER_ARGS=stock); BL_VKBRIDGE_WEBHELPER_ARGS overrides it for tests.
Adreno sessions are unchanged.