Answers: when capture, dictation, or the handoff breaks
Screen capture leans on a couple of browser APIs that fail in predictable ways. These pages explain why a capture, a permission, or a handoff to your coding agent went wrong, and the fastest way to fix it.
Most capture problems trace back to one of three things: a browser permission that was denied or revoked, an OS-level protection on the window you're trying to grab, or a handoff format the receiving agent can't read. Each page below starts with the symptom, names the likely cause, and gives you the fix.
Capture and permissions
When the screen-share prompt, the capture itself, or the image quality goes sideways.
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Screen capture isn't working
The usual causes when nothing captures, ranked by likelihood.
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'Permission denied' sharing your screen
Why the browser blocked the share and how to re-grant it.
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Can't capture a video or protected window
Why some windows capture as a black rectangle.
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Captured screenshot is blurry
Resolution, scaling, and crop choices that soften an image.
The agent handoff
When the capture is fine but the coding agent can't use it.
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