@-moz-document regexp("(?!(http|https)://www\\.youtube\\.com/embed/.*)((http|https)://www\\.youtube\\.com/.*)") {
    #appbar-guide-button-container,
    #logo-container,
    #yt-masthead-user {
        opacity: 0 !important;
        transition: .5s !important;
    }
    #appbar-guide-button-container:hover,
    #logo-container:hover,
    #yt-masthead-user:hover {
        opacity: 1 !important;
    }
    #content {
        box-shadow: none !important;
        border-color: #000 !important;
    }
    #search-btn,
    .gsib_b,
    #footer-container {
        display: none !important;
    }
    #masthead-search-term {
        text-align: center !important;
        font-family: Open Sans !important;
    }
    #masthead-search {
        margin-left: 22px !important;
    }
    #yt-masthead-container {
        border-color: #000 !important;
    }
    #player {
        margin-top: -12px !important;
    }
    #theater-background, #page, #body-container {
        background: #e8eac6 !important;
    }
    /*#watch7-main.clearfix {
        border-top: 1px solid #000 !important;
    }*/
    #content {
        margin-top: 35px !important;
        margin-bottom: 0px !important;
        font-family: Open Sans !important;
        min-width: 200px !important;
    }
    /*#masthead-search-terms {
        opacity: .2 !important;
        transition: .3s !important;
    }
    input #masthead-search-term.gsfi {
        opacity: 1 !important;
    }*/
    #masthead-search-terms {
        border-color: #ccc !important;
        box-shadow: none !important;
    }
    #body-container {
        padding-bottom: 20px !important;
    }
    .yt-card-has-padding {
        border: 1px solid #000 !important;
        box-shadow: none !important;
        -moz-box-sizing: border-box !important;
    }
    #watch-action-panels.watch-action-panels {
        margin-top: 15px !important;
    }
    #player-api {
        border: 1px solid #000 !important;
        border-radius: 0px !important;
        margin-left: -1px !important;
        margin-top: -1px !important;
    }
    #yt-masthead-container {
        margin-top: -50px;
        box-shadow: 0px 0px 5px -3px #888;
        transition: .3s ease !important;
        transition-delay: 0s !important;
    }
    #masthead-positioner {
        height: 27px !important;
    }
    /*.feed-container {
        border: 1px solid #000 !important;
        -moz-box-sizing: border-box !important;
    }*/
    #masthead-appbar {
        border-bottom: 1px solid #000 !important;
    }
    #watch7-main.clearfix {
        min-width: 0px !important;
        width: 976px !important;
        max-width: 976px !important;
        margin-left: auto !important;
        margin-right: auto !important;
        -moz-box-sizing: border-box !important;
    }
    .branded-page-v2-primary-col {
        margin-left: auto !important;
        margin-right: auto !important;
    }
    .branded-page-v2-primary-col .yt-card.clearfix {
        width: 800px !important;
        max-width: 800px !important;
        min-width: 300px !important;
        margin: 0 auto !important;
        -moz-box-sizing: border-box !important;
        border: 1px solid #000 !important;
        margin-bottom: 30px !important;
        margin-top: -40px !important;
    }
    #appbar-guide-menu,
    .branded-page-v2-secondary-col,
    .ytp-button.ytp-button-watch-later,
    .ytp-settings-hd-quality-badge {
        display: none !important;
    }
}