Firefox侧栏是怎么回事？

怎么能取消侧栏

用下面這個 Stylish 腳本

/*
 ***************************************************************
 * --- Created JUNE 10 2009 --- By Barbie Foster  -------      *
 * Barbiegirl  http://userstyles.org/users/13023               *
 * TITLE: WEBPAGE Scrollbars ONLY - Removed (Use Scrollwheel)  *
 *  http://userstyles.org/styles/18645                         *
 ***************************************************************
*/

/*IMPORTANT::RELOAD WEBPAGE AND ANY TABS ALREADY OPENED AFTER INSTALLING THIS STYLE TO SEE THE RESULTS OF THIS STYLE and after Uninstalling or Disable YOU MUST DO A Firefox RESTART to REMOVE COMPLETELY*/

@-moz-document url-prefix(http://),

url-prefix(https://) {

/*REMOVES BOTH VERTICAL AND HORIZONTAL WEBPAGE SCROLLBARS */
/*REMOVE THIS CODE SECTION IF YOU ONLY WANT TO REMOVE WEBPAGE HORIZONTAL SCROLLBARS AND KEEP WEBPAGE VERTICAL SCROLLBARS - THEN RELOAD ALL OPEN TAB WEBPAGES TO SEE THE CHANGED RESULTS */
scrollbar
{
display:none!important;
}

/*//////////////////////////////////////////////////////////////////////*/

/*REMOVES ONLY HORIZONTAL WEBPAGE SCROLLBARS */

scrollbar[orient="horizontal"]
{
display:none!important;
}

}