diff --git a/CHANGELOG.md b/CHANGELOG.md
index 894e8bd12bcfa09bb59879b6910f7e9bfdd23e54..396e816250bca309154153069f8eff90a9c27f57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ Note that since we don't clearly distinguish between a public and private interf
 ## [Unreleased]
 
 - Add ``PluginFeatureDetection`` and disable WBOIT in Safari 15.
+- Add ``disable-wboit`` Viewer GET param
+- Add ``prefer-webgl1`` Viewer GET param
 
 ## [v3.0.0-dev.7] - 2021-12-20
 
diff --git a/src/apps/viewer/index.html b/src/apps/viewer/index.html
index 21c287ff5824233b66922127583c5150ae1c732d..d5e4b11e43a9d8bb3dea64c6a94906b00a78366e 100644
--- a/src/apps/viewer/index.html
+++ b/src/apps/viewer/index.html
@@ -56,6 +56,8 @@
             var pixelScale = getParam('pixel-scale', '[^&]+').trim();
             var pickScale = getParam('pick-scale', '[^&]+').trim();
             var pickPadding = getParam('pick-padding', '[^&]+').trim();
+            var disableWboit = getParam('disable-wboit', '[^&]+').trim() === '1';
+            var preferWebgl1 = getParam('prefer-webgl1', '[^&]+').trim() === '1';
 
             molstar.Viewer.create('app', {
                 layoutShowControls: !hideControls,
@@ -69,6 +71,8 @@
                 pixelScale: parseFloat(pixelScale) || 1,
                 pickScale: parseFloat(pickScale) || 0.25,
                 pickPadding: isNaN(parseFloat(pickPadding)) ? 1 : parseFloat(pickPadding),
+                enableWboit: !disableWboit,
+                preferWebgl1: preferWebgl1,
             }).then(viewer => {
                 var snapshotId = getParam('snapshot-id', '[^&]+').trim();
                 if (snapshotId) viewer.setRemoteSnapshot(snapshotId);
diff --git a/src/apps/viewer/index.ts b/src/apps/viewer/index.ts
index 9a10546d3c157b7515ae561dee2a15f3a01e38da..823de49342c70862f92985e445933e5670a03d7f 100644
--- a/src/apps/viewer/index.ts
+++ b/src/apps/viewer/index.ts
@@ -84,6 +84,7 @@ const DefaultViewerOptions = {
     pickScale: PluginConfig.General.PickScale.defaultValue,
     pickPadding: PluginConfig.General.PickPadding.defaultValue,
     enableWboit: PluginConfig.General.EnableWboit.defaultValue,
+    preferWebgl1: PluginConfig.General.PreferWebGl1.defaultValue,
 
     viewportShowExpand: PluginConfig.Viewport.ShowExpand.defaultValue,
     viewportShowControls: PluginConfig.Viewport.ShowControls.defaultValue,
@@ -144,6 +145,7 @@ export class Viewer {
                 [PluginConfig.General.PickScale, o.pickScale],
                 [PluginConfig.General.PickPadding, o.pickPadding],
                 [PluginConfig.General.EnableWboit, o.enableWboit],
+                [PluginConfig.General.PreferWebGl1, o.preferWebgl1],
                 [PluginConfig.Viewport.ShowExpand, o.viewportShowExpand],
                 [PluginConfig.Viewport.ShowControls, o.viewportShowControls],
                 [PluginConfig.Viewport.ShowSettings, o.viewportShowSettings],