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how do you lock preferences

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I want to keep my son from viewing any images on the web. How do I lock this preference to keep him from changing it

I want to keep my son from viewing any images on the web. How do I lock this preference to keep him from changing it

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Do you want to do that on a mobile device or on a desktop computer?

I don't know if that is possible on a mobile device, but you can do that on a desktop.

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for mobile you just enable it, no lock is implemented now.

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twork. image. imageBehavior Integer Determines when images should be loaded. 0 (default): Load all images 1: Load images from same (originating) server only 2: Do not load any images Note: In Firefox, this can be changed via "Tools → Options → Web Features → Load Images / for the originating web site only" In Firefox 1.5 and above, this preference has been renamed to permissions.default.image.