diff --git a/config/LocalSettings.php b/config/LocalSettings.php
index bf0569a..0dbcb04 100644
--- a/config/LocalSettings.php
+++ b/config/LocalSettings.php
@@ -339,7 +339,6 @@
  * MediaWiki thumbnailing is all over the place (T360589)
  *
  * TODO: Wait on https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1084920
- * TODO: Set wgMediaViewerThumbnailBucketSizes once we move to MW 1.43
  *
  * List of image widths on the wiki
  * 120px - File history on file page (ImageHistoryList.php)
@@ -372,10 +371,10 @@
 $wgDefaultUserOptions['thumbsize'] = 2;
 // Reduce the number of image sizes served in description page
 $wgImageLimits = [
-	[ SCT_THUMB_SIZES[3][0], SCT_THUMB_SIZES[3][1] ], // image size 0
-	[ SCT_THUMB_SIZES[4][0], SCT_THUMB_SIZES[4][1] ], // image size 1
-	[ SCT_THUMB_SIZES[5][0], SCT_THUMB_SIZES[5][1] ], // image size 2
-	[ SCT_THUMB_SIZES[6][0], SCT_THUMB_SIZES[6][1] ], // image size 3
+	[ SCT_THUMB_SIZES[2][0], SCT_THUMB_SIZES[2][1] ], // image size 0
+	[ SCT_THUMB_SIZES[3][0], SCT_THUMB_SIZES[3][1] ], // image size 1
+	[ SCT_THUMB_SIZES[4][0], SCT_THUMB_SIZES[4][1] ], // image size 2
+	[ SCT_THUMB_SIZES[5][0], SCT_THUMB_SIZES[5][1] ], // image size 3
 ];
 // Set to 1280px image by default
 $wgDefaultUserOptions['imagesize'] = 2; // image size 2
@@ -383,7 +382,7 @@
 // Use intermediary thumbnails to speed up thumbnail rendering
 // This will result in several chained lossy transformations
 // but we need it because the wiki uses a lot of high quality images
-$wgThumbnailBuckets = [ SCT_THUMB_SIZES[5][0] ];
+$wgThumbnailBuckets = [ SCT_THUMB_SIZES[4][0] ];
 $wgThumbnailMinimumBucketDistance = 100;
 
 // Gallery settings
@@ -776,6 +775,12 @@
  * @see https://github.com/wikimedia/mediawiki-extensions-MultimediaViewer
  */
 $wgMediaViewerEnableByDefault = true;
+$wgMediaViewerThumbnailBucketSizes = [
+	SCT_THUMB_SIZES[2][0],
+	SCT_THUMB_SIZES[3][0],
+	SCT_THUMB_SIZES[4][0],
+	SCT_THUMB_SIZES[5][0]
+];
 
 /**
  * Extension:MultiPurge
@@ -1414,20 +1419,3 @@
     }
     return true;
 };
-
-/** @see https://www.mediawiki.org/wiki/Manual:Hooks/SoftwareInfo */
-$wgHooks['SoftwareInfo'][] = function( &$software ) {
-	// Add Wikidiff2 to "Installed software" in Special:Version
-	// Backported from http://phabricator.wikimedia.org/T339915
-	if ( phpversion( "wikidiff2" ) ) {
-		$software[ '[https://www.mediawiki.org/wiki/Wikidiff2 wikidiff2]' ] = phpversion( "wikidiff2" );
-	}
-};
-
-/** @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforePageDisplay */
-$wgHooks['BeforePageDisplay'][] = function( $out, $skin ) {
-	// Don't index VE edit pages (https://phabricator.wikimedia.org/T319124)
-	if ( $out->getRequest()->getVal( 'veaction' ) ) {
-		$out->setRobotPolicy( 'noindex,nofollow' );
-	}
-};