diff --git a/apps/web/src/components/Basenames/RegistrationProfileForm/index.tsx b/apps/web/src/components/Basenames/RegistrationProfileForm/index.tsx
index 3856b5bfe1c..fb1ddd368e4 100644
--- a/apps/web/src/components/Basenames/RegistrationProfileForm/index.tsx
+++ b/apps/web/src/components/Basenames/RegistrationProfileForm/index.tsx
@@ -73,11 +73,14 @@ export default function RegistrationProfileForm() {
       }
 
       if (currentFormStep === FormSteps.Keywords) {
-        writeTextRecords()
-          .then()
-          .catch((error) => {
+        // Handle async operation with void to acknowledge we're intentionally not awaiting
+        void (async () => {
+          try {
+            await writeTextRecords();
+          } catch (error) {
             logError(error, 'Failed to write text records');
-          });
+          }
+        })();
       }
 
       event.preventDefault();
diff --git a/apps/web/src/components/Basenames/RegistrationSuccessMessage/index.tsx b/apps/web/src/components/Basenames/RegistrationSuccessMessage/index.tsx
index e9328d11009..88f1040b358 100644
--- a/apps/web/src/components/Basenames/RegistrationSuccessMessage/index.tsx
+++ b/apps/web/src/components/Basenames/RegistrationSuccessMessage/index.tsx
@@ -23,21 +23,26 @@ export default function RegistrationSuccessMessage() {
 
   const claimUSDC = useCallback(() => {
     setPopupMessage('USDC is being sent to your wallet');
-    fetch(`${process.env.NEXT_PUBLIC_USDC_URL}?address=${address}`, {
-      method: 'GET',
-      headers: { 'Content-Type': 'application/json' },
-    })
-      .then(async (response) => {
+    // Handle async operation with void to acknowledge we're intentionally not awaiting
+    void (async () => {
+      try {
+        const response = await fetch(`${process.env.NEXT_PUBLIC_USDC_URL}?address=${address}`, {
+          method: 'GET',
+          headers: { 'Content-Type': 'application/json' },
+        });
+
         if (!response.ok) {
           const resp = (await response.json()) as { error: string };
           throw new Error(resp.error);
         }
         setPopupMessage('USDC claimed successfully!');
-      })
-      .catch((error) => {
-        setPopupMessage(`${error.message}`);
+      } catch (error) {
+        const errorMessage =
+          error instanceof Error ? error.message : 'Failed to claim USDC: Unknown error';
+        setPopupMessage(errorMessage);
         console.error('Error:', error);
-      });
+      }
+    })();
   }, [address]);
 
   const closePopup = useCallback(() => setPopupMessage(null), []);
diff --git a/apps/web/src/components/Basenames/UsernameProfileSettingsAvatar/index.tsx b/apps/web/src/components/Basenames/UsernameProfileSettingsAvatar/index.tsx
index 5caa3e98c0b..dd9d5639baf 100644
--- a/apps/web/src/components/Basenames/UsernameProfileSettingsAvatar/index.tsx
+++ b/apps/web/src/components/Basenames/UsernameProfileSettingsAvatar/index.tsx
@@ -69,13 +69,12 @@ export default function UsernameProfileSettingsAvatar() {
     [logError, profileUsername, updateTextRecords],
   );
 
-  const saveAvatar = useCallback(() => {
-    // Write the records
-    writeTextRecords()
-      .then()
-      .catch((error) => {
-        logError(error, 'Failed to write text records');
-      });
+  const saveAvatar = useCallback(async () => {
+    try {
+      await writeTextRecords();
+    } catch (error) {
+      logError(error, 'Failed to write text records');
+    }
   }, [logError, writeTextRecords]);
 
   const onClickSave = useCallback(
@@ -85,20 +84,22 @@ export default function UsernameProfileSettingsAvatar() {
       if (!currentWalletIsProfileEditor) return false;
 
       if (avatarFile) {
-        uploadFile(avatarFile)
-          .then((result) => {
+        // Handle async operation with void to acknowledge we're intentionally not awaiting
+        void (async () => {
+          try {
+            const result = await uploadFile(avatarFile);
             // set the uploaded result as the url
             if (result) {
               logEventWithContext('avatar_upload_success', ActionType.change);
               setAvatarUploadedAndReadyToSave(true);
             }
-          })
-          .catch((error) => {
+          } catch (error) {
             logError(error, 'Failed to upload avatar');
             logEventWithContext('avatar_upload_failed', ActionType.error);
-          });
+          }
+        })();
       } else {
-        saveAvatar();
+        void saveAvatar();
       }
     },
     [
@@ -113,7 +114,7 @@ export default function UsernameProfileSettingsAvatar() {
 
   useEffect(() => {
     if (avatarUploadAndReadyToSave) {
-      saveAvatar();
+      void saveAvatar();
       setAvatarUploadedAndReadyToSave(false);
     }
   }, [avatarUploadAndReadyToSave, saveAvatar]);
diff --git a/apps/web/src/components/Basenames/UsernameProfileSidebar/index.tsx b/apps/web/src/components/Basenames/UsernameProfileSidebar/index.tsx
index c54e7a6e145..f0632cc39f7 100644
--- a/apps/web/src/components/Basenames/UsernameProfileSidebar/index.tsx
+++ b/apps/web/src/components/Basenames/UsernameProfileSidebar/index.tsx
@@ -77,21 +77,31 @@ export default function UsernameProfileSidebar() {
 
   const reclaimProfile = useCallback(() => {
     if (!reclaimContract) return;
-    initiateReclaim(reclaimContract)
-      .then((result) => console.log({ result }))
-      .catch((error) => {
+
+    // Handle async operation with void to acknowledge we're intentionally not awaiting
+    void (async () => {
+      try {
+        const result = await initiateReclaim(reclaimContract);
+        console.log({ result });
+      } catch (error) {
         logError(error, 'Failed to reclaim profile');
-      });
+      }
+    })();
   }, [initiateReclaim, logError, reclaimContract]);
 
   useEffect(() => {
-    if (reclaimStatus === WriteTransactionWithReceiptStatus.Success) {
-      profileRefetch()
-        .then()
-        .catch((error) => {
-          logError(error, 'Failed to refetch profile');
-        });
+    // Refetch profile after successful reclaim
+    async function handleRefetch() {
+      if (reclaimStatus !== WriteTransactionWithReceiptStatus.Success) return;
+
+      try {
+        await profileRefetch();
+      } catch (error) {
+        logError(error, 'Failed to refetch profile');
+      }
     }
+
+    void handleRefetch();
   }, [logError, profileRefetch, reclaimStatus]);
 
   const textRecordKeywords = existingTextRecords[UsernameTextRecordKeys.Keywords];
diff --git a/apps/web/src/components/Basenames/UsernameProfileTransferOwnershipModal/index.tsx b/apps/web/src/components/Basenames/UsernameProfileTransferOwnershipModal/index.tsx
index d03eb2b5396..1f79b064347 100644
--- a/apps/web/src/components/Basenames/UsernameProfileTransferOwnershipModal/index.tsx
+++ b/apps/web/src/components/Basenames/UsernameProfileTransferOwnershipModal/index.tsx
@@ -86,14 +86,16 @@ export default function UsernameProfileTransferOwnershipModal({
       return;
     }
 
-    profileRefetch()
-      .then(() => {
+    // Handle async operation with void to acknowledge we're intentionally not awaiting
+    void (async () => {
+      try {
+        await profileRefetch();
         setShowProfileSettings(false);
         onClose();
-      })
-      .catch((error) => {
+      } catch (error) {
         logError(error, 'Failed to refetch Owner');
-      });
+      }
+    })();
   }, [currentOwnershipStep, logError, onClose, profileRefetch, setShowProfileSettings]);
 
   // Memos
diff --git a/apps/web/src/components/ConnectWalletButton/CustomWalletAdvancedAddressDetails.tsx b/apps/web/src/components/ConnectWalletButton/CustomWalletAdvancedAddressDetails.tsx
index a58bd765b26..3d72b18ab48 100644
--- a/apps/web/src/components/ConnectWalletButton/CustomWalletAdvancedAddressDetails.tsx
+++ b/apps/web/src/components/ConnectWalletButton/CustomWalletAdvancedAddressDetails.tsx
@@ -11,17 +11,18 @@ export function CustomWalletAdvancedAddressDetails() {
 
   const [, copy] = useCopyToClipboard();
   const handleCopyAddress = useCallback(() => {
-    copy(String(address))
-      .then(() => {
+    // Handle async operation with void to acknowledge we're intentionally not awaiting
+    void (async () => {
+      try {
+        await copy(String(address));
         setCopyText('Copied');
-      })
-      .catch((err) => {
+      } catch (err) {
         setCopyText('Failed to copy');
         console.error('Failed to copy address:', err);
-      })
-      .finally(() => {
+      } finally {
         setTimeout(() => setCopyText('Copy'), 2000);
-      });
+      }
+    })();
   }, [address, copy]);
 
   if (!address || !chain) {
diff --git a/apps/web/src/components/ImageCloudinary/index.tsx b/apps/web/src/components/ImageCloudinary/index.tsx
index 8b0b20e2687..4cba47523fe 100644
--- a/apps/web/src/components/ImageCloudinary/index.tsx
+++ b/apps/web/src/components/ImageCloudinary/index.tsx
@@ -51,6 +51,7 @@ export default function ImageCloudinary({
 
     // ref: https://support.cloudinary.com/hc/en-us/articles/209209649-Does-Cloudinary-impose-a-URL-length-limit
     if (shouldUploadToCloudinary) {
+      // Fetch Cloudinary URL and handle errors with async/await
       async function handleGetCloudinaryUrl() {
         try {
           const response = await fetch('/api/cloudinaryUrl', {
@@ -78,9 +79,7 @@ export default function ImageCloudinary({
         }
       }
 
-      handleGetCloudinaryUrl()
-        .then()
-        .catch((error) => console.log(error));
+      void handleGetCloudinaryUrl();
     }
   }, [absoluteSrc, shouldUploadToCloudinary, width]);
 
diff --git a/apps/web/src/components/NeynarCast/index.tsx b/apps/web/src/components/NeynarCast/index.tsx
index 75ed5dbc46b..ad0ec15cdcd 100644
--- a/apps/web/src/components/NeynarCast/index.tsx
+++ b/apps/web/src/components/NeynarCast/index.tsx
@@ -112,13 +112,17 @@ export default function NeynarCast({
   const [data, setData] = useState<NeynarCastData['cast']>();
   const { logError } = useErrors();
   useEffect(() => {
-    fetchCast({ type, identifier })
-      .then((result) => {
+    // Fetch Neynar cast data with async/await
+    async function loadCast() {
+      try {
+        const result = await fetchCast({ type, identifier });
         if (result) setData(result);
-      })
-      .catch((error) => {
+      } catch (error) {
         logError(error, 'Failed to load Cast');
-      });
+      }
+    }
+
+    void loadCast();
   }, [identifier, logError, type]);
 
   const onClickCast = useCallback(
diff --git a/apps/web/src/components/ThreeHero/DynamicRigidBody.tsx b/apps/web/src/components/ThreeHero/DynamicRigidBody.tsx
index f912d80499b..b63692bb209 100644
--- a/apps/web/src/components/ThreeHero/DynamicRigidBody.tsx
+++ b/apps/web/src/components/ThreeHero/DynamicRigidBody.tsx
@@ -10,13 +10,18 @@ export const DynamicRigidBody = forwardRef<RapierRigidBody, RigidBodyProps>(
     const [RigidBodyDynamic, setRigidBody] = useState<typeof RigidBody>();
     const { logError } = useErrors();
 
-    // Import needs to happen on render
+    // Import needs to happen on render with async/await
     useEffect(() => {
-      import('@react-three/rapier')
-        .then((mod) => {
+      async function loadRigidBody() {
+        try {
+          const mod = await import('@react-three/rapier');
           setRigidBody(() => mod.RigidBody);
-        })
-        .catch((error) => logError(error, 'Failed to load RigidBody'));
+        } catch (error) {
+          logError(error, 'Failed to load RigidBody');
+        }
+      }
+
+      void loadRigidBody();
     }, [logError]);
 
     if (!RigidBodyDynamic) return null;
diff --git a/apps/web/src/hooks/useSetPrimaryBasename.ts b/apps/web/src/hooks/useSetPrimaryBasename.ts
index aafec1d432d..f6fcd36c365 100644
--- a/apps/web/src/hooks/useSetPrimaryBasename.ts
+++ b/apps/web/src/hooks/useSetPrimaryBasename.ts
@@ -95,11 +95,18 @@ export default function useSetPrimaryBasename({ secondaryUsername }: UseSetPrima
   }, [address, secondaryUsername, secondaryUsernameChain.id, signMessageAsync]);
 
   useEffect(() => {
-    if (transactionIsSuccess) {
-      refetchPrimaryUsername()
-        .then()
-        .catch((error) => logError(error, 'failed to refetch username'));
+    // Refetch the primary username after a successful transaction
+    async function handleRefetch() {
+      if (!transactionIsSuccess) return;
+
+      try {
+        await refetchPrimaryUsername();
+      } catch (error) {
+        logError(error, 'failed to refetch username');
+      }
     }
+
+    void handleRefetch();
   }, [logError, refetchPrimaryUsername, transactionIsSuccess]);
 
   const setPrimaryName = useCallback(async (): Promise<boolean | undefined> => {
diff --git a/apps/web/src/utils/logger.ts b/apps/web/src/utils/logger.ts
index 786ebe767a2..ea29a8aa97b 100644
--- a/apps/web/src/utils/logger.ts
+++ b/apps/web/src/utils/logger.ts
@@ -62,9 +62,14 @@ class CustomLogger {
         console.error(logEntry);
         // Skip Bugsnag during E2E tests
         if (process.env.E2E_TEST !== 'true') {
-          bugsnagNotify(message, (e) => e.addMetadata('baseweb', { meta })).catch((e) =>
-            console.error('Error reporting to Bugsnag', e),
-          );
+          // Report error to Bugsnag with async/await - fire and forget
+          void (async () => {
+            try {
+              await bugsnagNotify(message, (e) => e.addMetadata('baseweb', { meta }));
+            } catch (e) {
+              console.error('Error reporting to Bugsnag', e);
+            }
+          })();
         }
         break;
       default:
diff --git a/libs/base-ui/contexts/Experiments.tsx b/libs/base-ui/contexts/Experiments.tsx
index 313a813da8e..bcef6fd289a 100644
--- a/libs/base-ui/contexts/Experiments.tsx
+++ b/libs/base-ui/contexts/Experiments.tsx
@@ -61,13 +61,17 @@ export default function ExperimentsProvider({ children }: ExperimentsProviderPro
   }, [experimentClient]);
 
   useEffect(() => {
-    startExperiment()
-      .then(() => {
+    // Start the experiment client and handle errors with async/await
+    async function initializeExperiment() {
+      try {
+        await startExperiment();
         setIsReady(true);
-      })
-      .catch((error) => {
+      } catch (error) {
         console.log(`Error starting experiments for ${ampDeploymentKey}:`, error);
-      });
+      }
+    }
+
+    void initializeExperiment();
   }, [experimentClient, startExperiment]);
 
   const getUserVariant = useCallback(