Firefox user CSS sync

userContent.css

/*
 * Since it's difficult or impossible to synchronize user CSS, I'm using this to manually
 * update changes across all my browsers.
 *
 * How to install:  https://www.reddit.com/r/FirefoxCSS/wiki/index/tutorials/
 *
 * To edit this file:

        # The most recently-used profile directory
        FIREFOX_PROFILE=$( ls -1rtd $( cygpath -u "$APPDATA\Mozilla\Firefox\Profiles" )/* | tail -1 )
        cd $FIREFOX_PROFILE
        mkdir -p chrome;   cd chrome;   ls -lrt
        vim userContent.css

 * 
 * If a lot of white blank space appears on the left side of Amazon, and won't go away, here's
 * how to solve it:
 *   https://www.reddit.com/r/amazonprime/comments/1rahgmy/what_is_this_empty_white_space_and_how_do_i_get/o78b5dj/
 *   https://www.reddit.com/r/uBlockOrigin/comments/1pod2g6/block_rufus_popup_on_amazon_in_firefox_without/
 */


@-moz-document domain(www.amazon.com) {

    /* delete the Rufus auto-popup */
    div#nav-flyout-rufus   {
        display: none !important;
    }

    /* delete the Rufus auto-popup */
    body.rufus-docked-left {
        padding: 0 !important;
    }

    /* delete the strip that's pure advertisement */
    div#percolate-ui-ilm_div {
        display: none;
    }

}