diff --git a/src/App.css b/src/App.css
index ea0fe5d..d56cce6 100644
--- a/src/App.css
+++ b/src/App.css
@@ -92,6 +92,10 @@ progress::-webkit-progress-value {
     background: transparent !important;
 }
 
+.tag {
+    background: transparent !important;
+}
+
 .notification a:not(.button):not(.dropdown-item) {
     text-decoration: none;
 }
@@ -319,6 +323,11 @@ code {
         background: #343942;
     }
 
+    .tag {
+        background: transparent !important;
+        color: #adbac7 !important;
+    }
+
     .notification.is-primary .subtitle {
         color: #fff !important;
     }
diff --git a/src/Home.tsx b/src/Home.tsx
index 42e021f..91ef371 100644
--- a/src/Home.tsx
+++ b/src/Home.tsx
@@ -36,7 +36,7 @@ const Home = ({
 }) => {
 	const [formData, setFormData] = useState<FormData>({
 		spanStart: 0,
-		spanEnd: '',
+		spanEnd: nets[0].maxBlock !== 0 ? nets[0].maxBlock : '',
 		network: 0,
 	});
 
@@ -65,7 +65,7 @@ const Home = ({
 
   const fetchBlocksInRange = async (retryIndex: number | null = null) => {
 		if (formData.spanStart === '' || formData.spanEnd === '' || formData.spanEnd < 0) return onModal('failed', 'Insert correct data');
-		if (formData.spanStart < 0 || formData.spanEnd < 0 || formData.spanStart > nets[formData.network].maxBlock || formData.spanEnd > nets[formData.network].maxBlock) return onModal('failed', 'Insert correct borders');
+		if (formData.spanStart < 0 || formData.spanEnd < 0 || ((formData.spanStart > nets[formData.network].maxBlock || formData.spanEnd > nets[formData.network].maxBlock) && nets[formData.network].maxBlock !== 0)) return onModal('failed', 'Insert correct borders');
 
 
 		if (retryIndex === null) {
@@ -134,6 +134,8 @@ const Home = ({
 		} catch (error: any) {
 			if (error.message.indexOf('showSaveFilePicker is not a function') !== -1) {
 				onModal('failed', 'Your current browser does not support this site\'s functionality. For the best experience, please use Chrome 86+ (recommended).', 'about');
+			} else if (error.message.indexOf('The user aborted a request.') !== -1) {
+				onModal('failed', 'Aborted by user.');
 			} else {
 				onModal('failed', error.message || 'Error occurred during block fetching.', (retryIndexTemp: number) => fetchBlocksInRange(+formData.spanStart + retryIndexTemp));
 			}