Fix a black screen in the browser

Common causes

Graphics acceleration problems, stale cached files, blocked scripts, low memory, fullscreen resizing, or a failed runtime restore can all show up as a black screen.

Fix steps

Refresh once, check hardware acceleration, close heavy tabs, disable browser extensions for the site, and try leaving fullscreen before entering it again. On mobile, rotate after the game view loads.

Report details

Include audio status, whether the page was still clickable, and the moment the screen went black. Useful reports say if it happened during launch, during fullscreen, or after switching tabs.

Related pages

Check whether the game is still alive

A black screen with audio, clicks, or cursor changes is different from a fully crashed tab. If the page is still responding, fullscreen or canvas sizing is more likely than a total launch failure.

If the browser tab itself becomes unresponsive, mention that. Freezing the whole tab usually points to memory, graphics, or a modded runtime problem.

Display fixes worth trying

Leave fullscreen, wait one second, then enter fullscreen again. On mobile, rotate to landscape before entering fullscreen. On desktop, check that hardware acceleration is enabled unless your browser or GPU has a known issue with it.

If this started after an update, refresh the page once so the newest shell files are loaded.

Step by step black screen fix

First decide whether the tab is alive. If the cursor changes, audio plays, or buttons still respond, the problem is likely display sizing or rendering. If the whole tab is unresponsive, it is closer to a runtime crash.

• Leave fullscreen.
• Wait one second.
• Enter fullscreen again after the game area is visible.
• Check hardware acceleration.
• Close heavy tabs.
• Refresh once if this started after an update.
• Try another browser if the same device keeps showing a black screen.

Common black screen mistakes

Do not assume a black screen always means the save is gone. Often the session is alive but the canvas did not size correctly. Do not start a new session until you know whether the old one is recoverable.

What to report

Say whether audio continued, whether clicks worked, whether fullscreen was active, whether this was mobile or desktop, and whether the problem happened during launch or after switching tabs.

When to stop troubleshooting and report

Stop and report when the black screen returns after a refresh, after leaving and entering fullscreen, and after trying a second browser. Include whether the page is silent, whether the tab becomes unresponsive, and whether the screen appears after a run starts or before the menu appears.

Those details help separate a canvas sizing problem from a runtime failure or device memory problem.

Safe next step

If the tab is still alive, use the site controls before closing the browser. If the whole tab is unresponsive, wait a moment before forcing it closed so the browser can finish any pending local writes. That small pause can help recovery on the next launch.