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i play sudokufun.com everytime i type a number in a blue or clear box with the same number appears covering the puzzle witch is very annoying

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tycoonsoon
tycoonsoon
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When playing sudoku at sudokufun.com everytime I type in a number a clear or blue box appears over the puzzle which is really disturbing when trying todo this game. How do I turn this shadowing off?

When playing sudoku at sudokufun.com everytime I type in a number a clear or blue box appears over the puzzle which is really disturbing when trying todo this game. How do I turn this shadowing off?

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cor-el
cor-el
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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).