diff --git a/packages/wxt/e2e/utils.ts b/packages/wxt/e2e/utils.ts
index c83499902..7ab18d022 100644
--- a/packages/wxt/e2e/utils.ts
+++ b/packages/wxt/e2e/utils.ts
@@ -138,6 +138,11 @@ export class TestProject {
   private generateWxtConfig(inline: InlineConfig): InlineConfig {
     return {
       ...inline,
+      suppressWarnings: {
+        firefoxDataCollection: true,
+        firefoxId: true,
+        ...inline.suppressWarnings,
+      },
       vite: async (...args) => {
         const inlineVite = (await inline.vite?.(...args)) ?? {};
         return vite.mergeConfig<vite.UserConfig, vite.UserConfig>(
diff --git a/packages/wxt/src/internal-utils/testing/fake-objects.ts b/packages/wxt/src/internal-utils/testing/fake-objects.ts
index b9836092b..8be979a72 100644
--- a/packages/wxt/src/internal-utils/testing/fake-objects.ts
+++ b/packages/wxt/src/internal-utils/testing/fake-objects.ts
@@ -307,7 +307,10 @@ export const fakeResolvedConfig = fakeObjectCreator<ResolvedConfig>(() => {
     hooks: {},
     vite: () => ({}),
     plugins: [],
-    suppressWarnings: {},
+    suppressWarnings: {
+      firefoxDataCollection: true,
+      firefoxId: true,
+    },
   };
 });
 
diff --git a/packages/wxt/src/internal/__tests__/manifest.test.ts b/packages/wxt/src/internal/__tests__/manifest.test.ts
index ca4f56a52..2230a846d 100644
--- a/packages/wxt/src/internal/__tests__/manifest.test.ts
+++ b/packages/wxt/src/internal/__tests__/manifest.test.ts
@@ -2233,6 +2233,47 @@ describe('Manifest Utils', () => {
     });
   });
 
+  describe('data_collection_permissions', () => {
+    it('should warn when building for Firefox without data_collection_permissions', async () => {
+      setFakeWxt({
+        config: {
+          browser: 'firefox',
+          suppressWarnings: {
+            firefoxDataCollection: false,
+            firefoxId: true,
+          },
+        },
+      });
+
+      await generateManifest([], fakeBuildOutput());
+
+      expect(wxt.logger.warnOnce).toHaveBeenCalledWith(
+        expect.stringContaining('data_collection_permissions'),
+      );
+    });
+  });
+
+  describe('firefox extension id', () => {
+    it('should warn when building for Firefox without an extension id', async () => {
+      setFakeWxt({
+        config: {
+          browser: 'firefox',
+          command: 'build',
+          suppressWarnings: {
+            firefoxDataCollection: true,
+            firefoxId: false,
+          },
+        },
+      });
+
+      await generateManifest([], fakeBuildOutput());
+
+      expect(wxt.logger.warnOnce).toHaveBeenCalledWith(
+        expect.stringContaining('Firefox requires extension ID'),
+      );
+    });
+  });
+
   describe('stripPathFromMatchPattern', () => {
     it.each([
       ['<all_urls>', '<all_urls>'],