1 files changed, 39 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/browser/browser_ext_themes_alpha_accentcolor.js b/toolkit/components/extensions/test/browser/browser_ext_themes_alpha_accentcolor.js
new file mode 100644
index 0000000000..2799d37551
--- /dev/null
+++ b/toolkit/components/extensions/test/browser/browser_ext_themes_alpha_accentcolor.js
@@ -0,0 +1,39 @@
+"use strict";
+
+add_task(async function test_alpha_frame_color() {
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      theme: {
+        images: {
+          theme_frame: "image1.png",
+        },
+        colors: {
+          frame: "rgba(230, 128, 0, 0.1)",
+          tab_background_text: TEXT_COLOR,
+        },
+      },
+    },
+    files: {
+      "image1.png": BACKGROUND,
+    },
+  });
+
+  await extension.startup();
+
+  let computedStyle;
+  if (backgroundColorSetOnRoot()) {
+    let docEl = window.document.documentElement;
+    computedStyle = window.getComputedStyle(docEl);
+  } else {
+    let toolbox = document.querySelector("#navigator-toolbox");
+    computedStyle = window.getComputedStyle(toolbox);
+  }
+
+  Assert.equal(
+    computedStyle.backgroundColor,
+    "rgb(230, 128, 0)",
+    "Window background color should be opaque"
+  );
+
+  await extension.unload();
+});