idou.js

(function(){
  mappings.addUserMap([modes.NORMAL,modes.VISUAL],['<C-M-n>'], 'migiidou',
    function(){

      var n = gBrowser.mCurrentTab._tPos;

      if( n == (gBrowser.mTabContainer.childNodes.length - 1)){
        return
      }

      var tabs = gBrowser.mTabContainer.childNodes;
      gBrowser.moveTabTo(gBrowser.mCurrentTab, n+1);
      gBrowser.selectedTab = gBrowser.mTabs[n+1];

    },{
      rhs: 'migiidou'
    }
  );

  mappings.addUserMap([modes.NORMAL,modes.VISUAL],['<C-M-p>'], 'hidariidou',
    function(){

      var n = gBrowser.mCurrentTab._tPos;

      if( n == 0 ){
        return
      }

      var tabs = gBrowser.mTabContainer.childNodes;
      gBrowser.moveTabTo(gBrowser.mCurrentTab, n-1);
      gBrowser.selectedTab = gBrowser.mTabs[n-1];

    },{
      rhs: 'hidariidou'
    }
  );

})();