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how can I adjust the screen ratio - square boxes are now rectangles?

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Facebook, youtube etc. has the wrong aspect ratio. Square images are rectangles and widescreen videos are too short etc.

Facebook, youtube etc. has the wrong aspect ratio. Square images are rectangles and widescreen videos are too short etc.

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Try:

You can also try to disable hardware acceleration.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

If disabling hardware acceleration works then check if there is an update available for your graphics display driver.