Revert "Prevent clickjacking on about: pages"
Revert "Prevent clickjacking on about: pages"

This reverts commit 878f7c587d4f851ab861ba50ca177b0b03933007.

darkdh/browser-laptop,luixxiul/browser-laptop,darkdh/browser-laptop,pmkary/braver,Sh1d0w/browser-laptop,Sh1d0w/browser-laptop,jonathansampson/browser-laptop,darkdh/browser-laptop,willy-b/browser-laptop,dcposch/browser-laptop,luixxiul/browser-laptop,Sh1d0w/browser-laptop,willy-b/browser-laptop,luixxiul/browser-laptop,pmkary/braver,willy-b/browser-laptop,dcposch/browser-laptop,darkdh/browser-laptop,diasdavid/browser-laptop,timborden/browser-laptop,diasdavid/browser-laptop,timborden/browser-laptop,luixxiul/browser-laptop,pmkary/braver,diasdavid/browser-laptop,dcposch/browser-laptop,jonathansampson/browser-laptop,diasdavid/browser-laptop,pmkary/braver,jonathansampson/browser-laptop,dcposch/browser-laptop,timborden/browser-laptop,jonathansampson/browser-laptop,timborden/browser-laptop,willy-b/browser-laptop,Sh1d0w/browser-laptop