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What are all the available options are for typing about:xxxxx in the Omnibar (URL input box)? Specifically, the change the options on the browser.

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gives a list of available parameters.

To the second question:

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Sweet, didn't know the first one. Nice histograms. – slhck May 13 '11 at 17:45
about:version shows the command-line arguments. – Synetech May 13 '11 at 18:04

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