youtube.css

/* ==UserStyle==
@name           YouTube Blocker
@namespace      youtube-blocker
@version        1.1.0
@description    Make YouTube less addictive on Mobile, hide Shorts, Home, and Channel views.
@author         konsuko
==/UserStyle== */

@-moz-document domain("youtube.com"),
domain("m.youtube.com") {

    /* Hide the Shorts button */
    .shorts-button,
    .pivot-shorts {
        display: none;
    }

    /* Hide the Home button */
    .home-button,
    .pivot-w2w {
        display: none;
    }

    #header-bar {
        display: none;
    }

    [role=tablist] {
        display: none;
    }

    .watch-below-the-player {
        display: none;
    }
}

@document url("https://www.youtube.com/"),
url("https://m.youtube.com/") {
    body {
        display: none;
    }

    #header-bar {
        display: none;
    }

    [role=tablist] {
        display: none;
    }

    .watch-below-the-player {
        display: none;
    }
}

@document url("https://www.youtube.com/watch"),
url("https://m.youtube.com/watch") {
    body {
        display: block;
    }

    #header-bar {
        display: none;
    }

    [role=tablist] {
        display: none;
    }

    .watch-below-the-player {
        display: none;
    }
}

/* @-moz-document url-prefix("https://www.youtube.com/feed/subscriptions"), */
/* url-prefix("https://m.youtube.com/feed/subscriptions") { */
/*     body { */
/*         display: none; */
/*     } */
/**/
/*     #header-bar { */
/*         display: none; */
/*     } */
/**/
/*     [role=tablist] { */
/*         display: none; */
/*     } */
/**/
/*     .watch-below-the-player { */
/*         display: none; */
/*     } */
/* } */

/* @-moz-document url-prefix("https://www.youtube.com/channel/"), */
/* url-prefix("https://www.youtube.com/c/"), */
/* url-prefix("https://www.youtube.com/user/"), */
/* url-prefix("https://m.youtube.com/channel/"), */
/* url-prefix("https://m.youtube.com/c/"), */
/* url-prefix("https://m.youtube.com/user/") { */
/*     body { */
/*         display: none; */
/*     } */
/**/
/*     #header-bar { */
/*         display: none; */
/*     } */
/**/
/*     [role=tablist] { */
/*         display: none; */
/*     } */
/**/
/*     .watch-below-the-player { */
/*         display: none; */
/*     } */
/* } */