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Source Code in Firefox

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After pressing Control+U to view source code of a page, why do I get to see codes in vertical manner than in the usual horizontal line by line style? Or is there any means by which I can change how to view source code? Thanks

After pressing Control+U to view source code of a page, why do I get to see codes in vertical manner than in the usual horizontal line by line style? Or is there any means by which I can change how to view source code? Thanks

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In about:config (typed in the URL bar and accept the Warning) you can toggle view_source.wrap_long_lines from false to True by double-clicking on that preference.

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Can you attach a screenshot?