diff --git a/src/zen/boosts/ZenBoostsEditor.mjs b/src/zen/boosts/ZenBoostsEditor.mjs
index c40a541d7..c65b45e16 100644
--- a/src/zen/boosts/ZenBoostsEditor.mjs
+++ b/src/zen/boosts/ZenBoostsEditor.mjs
@@ -374,12 +374,6 @@ export class nsZenBoostEditor {
     }
     windowElem.setAttribute("editor", "code");
 
-    // Store the old boost editor width.
-    // The window needs the outer width which includes
-    // window chrome. This results in the window
-    // being smaller than it should be
-    this._boostEditorWidth = this.editorWindow.outerWidth;
-
     this.editorWindow.requestAnimationFrame(() => {
       this.editorWindow.resizeTo(
         this._codeEditorWidth,
@@ -413,7 +407,11 @@ export class nsZenBoostEditor {
     }
     windowElem.setAttribute("editor", "boost");
 
-    this.editorWindow.requestAnimationFrame(() => {
+    this.doc.getElementById("zen-boost-editor-root").style.display = "flex";
+    this.doc.getElementById("zen-boost-code-editor-root").style.display =
+      "none";
+
+    this.editorWindow.promiseDocumentFlushed(() => {
       this.editorWindow.resizeTo(
         this._boostEditorWidth,
         this.editorWindow.outerHeight
@@ -424,10 +422,6 @@ export class nsZenBoostEditor {
           this.editorWindow.screenY
         );
       }
-
-      this.doc.getElementById("zen-boost-editor-root").style.display = "flex";
-      this.doc.getElementById("zen-boost-code-editor-root").style.display =
-        "none";
     });
 
     // Disable picker mode
diff --git a/src/zen/boosts/zen-boosts.css b/src/zen/boosts/zen-boosts.css
index ba3e57b3c..4537642f2 100644
--- a/src/zen/boosts/zen-boosts.css
+++ b/src/zen/boosts/zen-boosts.css
@@ -139,6 +139,7 @@ body {
   user-select: none;
 
   width: 100%;
+  min-height: 582px;
   height: 100%;
   padding: 0;
   margin: 0;
diff --git a/src/zen/spaces/zen-workspaces.css b/src/zen/spaces/zen-workspaces.css
index f2260e55e..0007b69da 100644
--- a/src/zen/spaces/zen-workspaces.css
+++ b/src/zen/spaces/zen-workspaces.css
@@ -322,7 +322,6 @@ zen-workspace {
   height: 100%;
   overflow: hidden;
   color: var(--toolbox-textcolor);
-  will-change: transform;
 
   @media not (prefers-reduced-motion: reduce) {
     transition: padding-top 0.1s;
diff --git a/src/zen/tabs/zen-tabs/vertical-tabs.css b/src/zen/tabs/zen-tabs/vertical-tabs.css
index 8dfbcbd58..c24e2cc71 100644
--- a/src/zen/tabs/zen-tabs/vertical-tabs.css
+++ b/src/zen/tabs/zen-tabs/vertical-tabs.css
@@ -1131,7 +1131,6 @@
   transition:
     max-height 0.3s ease-out,
     grid-template-columns 0.3s ease-out;
-  will-change: transform;
   opacity: 1;
   --min-essentials-width-wrap: calc(var(--tab-min-height) + 4px);
   grid-template-columns: repeat(auto-fit, minmax(max(23.7%, var(--min-essentials-width-wrap)), 1fr));
diff --git a/src/zen/tests/mochitests/sandbox/browser.toml b/src/zen/tests/mochitests/sandbox/browser.toml
index 8e5eb4723..f12d053b9 100644
--- a/src/zen/tests/mochitests/sandbox/browser.toml
+++ b/src/zen/tests/mochitests/sandbox/browser.toml
@@ -25,11 +25,11 @@ tags = "os_integration"
 
 ["browser_content_sandbox_fs.js"]
 skip-if = [
-  "os == 'win' && os_version == '11.26100' && arch == 'x86' && debug", # bug 1379635
-  "os == 'win' && os_version == '11.26200' && arch == 'x86' && debug", # bug 1379635
-  "os == 'win' && os_version == '11.26100' && arch == 'x86_64' && debug", # bug 1379635
-  "os == 'win' && os_version == '11.26200' && arch == 'x86_64' && debug", # bug 1379635
   "os == 'mac' && os_version == '15.30' && arch == 'aarch64'", # Bug 2023967
+  "os == 'win' && os_version == '11.26100' && arch == 'x86' && debug", # bug 1379635
+  "os == 'win' && os_version == '11.26100' && arch == 'x86_64' && debug", # bug 1379635
+  "os == 'win' && os_version == '11.26200' && arch == 'x86' && debug", # bug 1379635
+  "os == 'win' && os_version == '11.26200' && arch == 'x86_64' && debug", # bug 1379635
 ]
 
 ["browser_content_sandbox_syscalls.js"]
@@ -38,7 +38,6 @@ skip-if = [
 skip-if = [
   "os == 'win' && os_version == '11.26200' && arch == 'x86' && debug", # bug 2028636
   "os == 'win' && os_version == '11.26200' && arch == 'x86_64' && debug", # bug 2028636
-  "os == 'linux' && debug && artifact", # bug 1945658
 ]
 run-if = [
   "debug",