diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e46cd448e56..13d102b23e3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -113,6 +113,13 @@ jobs:
         run: |
           npm run unit
 
+      - name: Run unit tests on Firefox
+        env:
+          FIREFOX: true
+          MOZ_WEBRENDER: 0
+        run: |
+          npm run funit
+
   windows:
     # https://github.com/actions/virtual-environments#available-environments
     runs-on: windows-latest
diff --git a/test/keyboard.spec.ts b/test/keyboard.spec.ts
index 13a2773dd5d..5aff0f95e79 100644
--- a/test/keyboard.spec.ts
+++ b/test/keyboard.spec.ts
@@ -127,7 +127,7 @@ describe('Keyboard', function () {
       await page.evaluate(() => document.querySelector('textarea').value)
     ).toBe('嗨a');
   });
-  it('should report shiftKey', async () => {
+  itFailsFirefox('should report shiftKey', async () => {
     const { page, server } = getTestState();
 
     await page.goto(server.PREFIX + '/input/keyboard.html');