As noticed at https://github.com/mozilla/geckodriver/issues/1156 the screenshot command doesn't return any data when an image has been loaded via the file:// URL. This is not a problem for other file types via file://.
OS: Unspecified → All
Priority: P3 → P2
Hardware: Unspecified → All
Summary: Screenshot command returns no data for images loaded via file:// → WebDriver:TakeScreenshot does not return data for images loaded via file://
Version: Version 3 → Trunk
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