How to map J as j and pass it to Firefox?

[Clark J. Wang]

I want to map J as j and pass j directly to Google Reader. I tried following mapping but it does not work:

group! greader -locations=https://www.google.com/reader/*
nnoremap -group greader  J  j<pass>

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Clark J. Wang

[Kris Maglione]

group! greader -locations=https://www.google.com/reader/*
map -b J <C-v>j

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Kris Maglione

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