diff --git a/js&css/extension/www.youtube.com/appearance/sidebar/sidebar.css b/js&css/extension/www.youtube.com/appearance/sidebar/sidebar.css
index c54f3491c..4857f6bdb 100644
--- a/js&css/extension/www.youtube.com/appearance/sidebar/sidebar.css
+++ b/js&css/extension/www.youtube.com/appearance/sidebar/sidebar.css
@@ -191,6 +191,32 @@ html[it-livechat='collapsed']
 	cursor: pointer;
 }
 
+/* Ensure live chat is fully visible and scrollable in theater mode */
+html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy #secondary,
+html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy #secondary-inner,
+html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy #chat-container,
+html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy ytd-live-chat-frame#chat {
+	height: calc(100vh - var(--it-header-size, 56px)) !important;
+	max-height: calc(100vh - var(--it-header-size, 56px)) !important;
+
+	/* Prevent horizontal scrollbar surprises */
+	overflow-x: hidden !important;
+}
+
+@supports (height: 100dvh) {
+	html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy #secondary,
+	html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy #secondary-inner,
+	html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy #chat-container,
+	html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy ytd-live-chat-frame#chat {
+		height: calc(100dvh - var(--it-header-size, 56px)) !important;
+		max-height: calc(100dvh - var(--it-header-size, 56px)) !important;
+	}
+}
+
+/* Only the actual chat should scroll */
+html[it-forced-theater-mode='true'][data-page-type='video'] ytd-watch-flexy ytd-live-chat-frame#chat {
+	overflow-y: auto !important;
+}
 
 /*--------------------------------------------------------------
 # HIDE PLAYLIST
diff --git a/js&css/web-accessible/core.js b/js&css/web-accessible/core.js
index 80059614b..9c33eb1b5 100644
--- a/js&css/web-accessible/core.js
+++ b/js&css/web-accessible/core.js
@@ -361,6 +361,7 @@ document.addEventListener('it-message-from-extension', function () {
 				case 'playerIncreaseDecreaseSpeedButtons':
 					if (ImprovedTube.storage.player_increase_decrease_speed_buttons === false) {
 						ImprovedTube.elements.buttons['it-increase-speed-button']?.remove();
+						ImprovedTube.elements.buttons['it-1x-speed-button']?.remove();
 						ImprovedTube.elements.buttons['it-decrease-speed-button']?.remove();
 					}
 					break