Does not display properly: much of space is white without text, etc.

Using Firefox on new laptop (HP Envy m6), synched to Firefox on old laptop. Much information doesn't display:

In Google mail, check-marks don't show, everything except text is white, and text doesn't appear on a lot of buttons. In Google drive, can see text but can't see colors outlining text. I'd like to post a screenshot but not sure how to do that.

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