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I am using Firefox 15.0 on OS X Mountain Lion alongside with vimperator. Note that I am using a Windows keyboard.

CtrlP is for moving focus to left tab in vimperator. However, the latest Firefox has also CtrlP to enable private browsing.

I looked for private browsing with FF "Customizable Shortcuts" addon but there is only CommandShiftP binding associated to it.

How can the CtrlP private browsing binding be turned off?

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Ctrl-P should be a shortcut for printing the current page. You sure it turns on private browsing? – jokerdino Sep 5 '12 at 3:41
meta + p is for print on mac. – perlwle Sep 5 '12 at 3:50

Private browsing mode on Firefox is initiated with CtrlShiftP.

When using vimperator, the key i can be used to instruct vimperator to ignore the next key press and to pass it directly along to the browser. Thus to achieve what you asked, press i CtrlShiftP.

Note, that i only ignores the key press that directly follows. If you want vimperator to ignore key presses for a longer period of time, press ShiftEsc. All key presses are then passed straight over to the browser until you press ShiftEsc again.

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that doesn't work for me. press i did prompt a IGNORE text on vimperator bar. but pressing meta shift p still prompt private browsing. note that on Mac, ctrl p also prompt private browsing. – perlwle Sep 25 '12 at 9:34
Worked for me on Ubuntu 13.04 with FF 22 and Vimperator. (I know, this is not Mac) – Jan Vlcinsky Jun 27 '13 at 13:05
Also there is an add-in for Firefox called Private tab which makes it available to open a single private tab (without opening a whole private window) using the Ctrl + Alt + t keyboard combination. – Mehrad Mar 5 '14 at 22:47
nnoremap <c-s-p> i<c-s-p>

on ~/.vimperatorrc and :source ~/.vimperatorrc automates what Dave said and gives us Ctrl+Shift+P back.

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