How to make this work

Download and install the extension Stylus

Copy and paste this css into the extension (URLs starting with: https://www.nba.com/games):

            /* ******* */
            /* NBA.com */
            /* ******* */

            .Layout_fixedContent__kWFtM {
            display: none;
            }

            .Layout_withSubNav__ByKRF {
            padding: 0;
            }

            .Layout_withShortStrip__krLX0 {
            padding: 0;
            }

            .Columns_left__XkWXE {
            width: 100%;
            }

            .Columns_right__RMqRd {
            display: none;
            }

            .Footer_footer__nKPS_ {
            display: none;
            }

            .GameDatePicker_gdpToggles__dQytG {
            display: none;
            }

            .GameHeroBackground_hero__BdLKJ {
            display: none;
            }

            .GameSummary_sumContainer__WBZiw > section:nth-child(1) {
            display: none;
            }
        

Copy and paste this css into the extension (URLs starting with: stats.wftda.com):

            /* ***** */
            /* WFTDA */
            /* ***** */

            .universalNavigation {
            display: none;
            }

            .mainNavigation {
            display: none;
            }

            .homeBanners {
            display: none;
            }
        

Copy and paste this css into the extension (URLs starting with: https://www.mlssoccer.com/schedule/scores):

            /* ************* */
            /* mlssoccer.com */
            /* ************* */

            .mls-c-header {
            display: none;
            }

            .mls-c-header {
            display:none;
            }

            div.mls-premium-leaderboard {
            display: none;
            }

            .d3-l-col__col-3 {
            display: none;
            }

            .d3-l-col__col-9 {
            width: 100%;
            margin: auto;
            }

            .mls-c-footer {
            display: none;
            }

            .d3-l-wrap > section:nth-child(5) {
            display: none;
            }

            .mls-o-masthead {
            display: none;
            }
        

Copy and paste this css into the extension (URLs starting with: https://www.mlb.com/scores):

            /* ******* */
            /* mlb.com */
            /* ******* */

            #react-header {
            display: none;
            }

            .SnSNavstyle__NavWrapper-sc-84yg8i-1 {
            display: none;
            }

            #react-footer {
            display: none;
            }
        

Copy and paste this css into the extension (URLs starting with: https://www.nhl.com/scores/):

            /* ******* */
            /* nhl.com */
            /* ******* */

            .nhl-c-header {
            display: none;
            }

            .sc-dGANrm {
            display: none;
            }

            .nhl-c-footer {
            display: none;
            }

            #ad-skin {
            display: none;
            }