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when I go to certain web sites the screen is larger than normal plus cannont use website as everything is to left of screen what gives this is not user friendly

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  • 最后回复者为 cor-el

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my screen on blackboard is to the extreme left The font is very large. The background is gone. This does not happen with yahoo.

my screen on blackboard is to the extreme left The font is very large. The background is gone. This does not happen with yahoo.

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Try resetting the zoom for that domain.
https://support.mozilla.com/en-US/kb/Page+Zoom

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Make sure that you allow pages to choose their colors and that you haven't enabled High Contrast in the Accessibility settings.

  • Tools > Options > Content : Fonts & Colors > Colors : [X] "Allow pages to choose their own colors, instead of my selections above"

If you use extensions (Tools > Add-ons > Extensions) like Adblock Plus or NoScript or Flash Block that can block content then make sure that such extensions aren't blocking content.

Start Firefox in Safe 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).