diff --git a/frontend/src/download.js b/frontend/src/download.js
index 47dac9f3..dc707083 100644
--- a/frontend/src/download.js
+++ b/frontend/src/download.js
@@ -13,7 +13,7 @@ $(document).ready(function() {
   //initiate progress bar
   $('#dl-progress').circleProgress({
     value: 0.0,
-    startAngle: -Math.PI/2,
+    startAngle: -Math.PI / 2,
     fill: '#00C8D7',
     size: 158
   });
@@ -21,16 +21,18 @@ $(document).ready(function() {
   function download() {
     const fileReceiver = new FileReceiver();
     const name = document.createElement('p');
-    const $btn = $('#download-btn');
 
     fileReceiver.on('progress', progress => {
       $('#download-page-one').hide();
       $('#download-progress').show();
-      let percent = progress[0]/progress[1];
+      const percent = progress[0] / progress[1];
       // update progress bar
-      $('#dl-progress').circleProgress('value', percent );
-      $('.percent-number').html(`${Math.floor(percent*100)}`);
-      $('.progress-text').append(` (${(progress[0]/1000000).toFixed(2)}MB of ${(progress[1]/1000000).toFixed(2)}MB)`);
+      $('#dl-progress').circleProgress('value', percent);
+      $('.percent-number').html(`${Math.floor(percent * 100)}`);
+      $('.progress-text').append(
+        ` (${(progress[0] / 1000000).toFixed(2)}MB of ${(progress[1] /
+          1000000).toFixed(2)}MB)`
+      );
       //on complete
       if (percent === 1) {
         fileReceiver.removeAllListeners('progress');
diff --git a/frontend/src/fileReceiver.js b/frontend/src/fileReceiver.js
index e65781fa..c73c6ae7 100644
--- a/frontend/src/fileReceiver.js
+++ b/frontend/src/fileReceiver.js
@@ -13,9 +13,6 @@ class FileReceiver extends EventEmitter {
 
         xhr.onprogress = event => {
           if (event.lengthComputable && event.target.status !== 404) {
-            const percentComplete = Math.floor(
-              event.loaded / event.total * 100
-            );
             this.emit('progress', [event.loaded, event.total]);
           }
         };
diff --git a/frontend/src/upload.js b/frontend/src/upload.js
index 303395f9..5ab4227f 100644
--- a/frontend/src/upload.js
+++ b/frontend/src/upload.js
@@ -47,7 +47,7 @@ $(document).ready(function() {
     //disable button for 3s
     $copyBtn.attr('disabled', true);
     $('#link').attr('disabled', true);
-    $copyBtn.html("<span class='icon-check'></span>");
+    $copyBtn.html('<span class=\'icon-check\'></span>');
     window.setTimeout(() => {
       $copyBtn.attr('disabled', false);
       $('#link').attr('disabled', false);
@@ -64,7 +64,7 @@ $(document).ready(function() {
   //initiate progress bar
   $('#ul-progress').circleProgress({
     value: 0.0,
-    startAngle: -Math.PI/2,
+    startAngle: -Math.PI / 2,
     fill: '#3B9DFF',
     size: 158
   });
@@ -79,9 +79,7 @@ $(document).ready(function() {
     $copyBtn.html('Copy to Clipboard');
   });
   //cancel the upload
-  $('#cancel-upload').click(() => {
-
-  });
+  $('#cancel-upload').click(() => {});
   // on file upload by browse or drag & drop
   function onUpload(event) {
     event.preventDefault();
@@ -98,14 +96,22 @@ $(document).ready(function() {
       $('#page-one').hide();
       $('#upload-progress').show();
       $('#upload-error').hide();
-      let percent = progress[0]/progress[1];
+      const percent = progress[0] / progress[1];
       // update progress bar
-      $('#ul-progress').circleProgress('value', percent );
-      $('.percent-number').html(`${Math.floor(percent*100)}`);
-      if(progress[1] < 1000000000){
-        $('.progress-text').html(`${file.name} (${(progress[0]/1000000).toFixed(1)}MB of ${(progress[1]/1000000).toFixed(1)}MB)`);
+      $('#ul-progress').circleProgress('value', percent);
+      $('.percent-number').html(`${Math.floor(percent * 100)}`);
+      if (progress[1] < 1000000000) {
+        $('.progress-text').html(
+          `${file.name} (${(progress[0] / 1000000).toFixed(
+            1
+          )}MB of ${(progress[1] / 1000000).toFixed(1)}MB)`
+        );
       } else {
-        $('.progress-text').html(`${file.name} (${(progress[0]/1000000).toFixed(1)}MB of ${(progress[1]/1000000000).toFixed(1)}GB)`);
+        $('.progress-text').html(
+          `${file.name} (${(progress[0] / 1000000).toFixed(
+            1
+          )}MB of ${(progress[1] / 1000000000).toFixed(1)}GB)`
+        );
       }
     });
 
@@ -135,7 +141,7 @@ $(document).ready(function() {
         console.log('Finished encrypting');
       }
     });
-
+    let t = '';
     fileSender
       .upload()
       .then(info => {
@@ -150,7 +156,7 @@ $(document).ready(function() {
         };
         localStorage.setItem(info.fileId, JSON.stringify(fileData));
         $('#upload-filename').html('Ready to Send');
-        const t = window.setTimeout(() => {
+        t = window.setTimeout(() => {
           $('#page-one').hide();
           $('#upload-progress').hide();
           $('#share-link').show();
@@ -210,15 +216,18 @@ $(document).ready(function() {
 
     const url = file.url.trim() + `#${file.secretKey}`.trim();
     $('#link').attr('value', url);
-    $('#copy-text').html('Copy and share the link to send your file: ' + file.name);
+    $('#copy-text').html(
+      'Copy and share the link to send your file: ' + file.name
+    );
     $popupText.attr('tabindex', '-1');
 
     name.appendChild(cellText);
 
     // create delete button
-    del.innerHTML = "<span class='icon-cancel-1' title='Delete' style='margin-left: -7px'></span>";
+    del.innerHTML =
+      '<span class=\'icon-cancel-1\' title=\'Delete\' style=\'margin-left: -7px\'></span>';
 
-    link.innerHTML = "<span class='icon-docs' title='Copy URL'></span>"
+    link.innerHTML = '<span class=\'icon-docs\' title=\'Copy URL\'></span>';
     //copy link to clipboard when icon clicked
     $(link).click(function() {
       const aux = document.createElement('input');
@@ -273,7 +282,7 @@ $(document).ready(function() {
     // create popup
     popupDiv.classList.add('popup');
     $popupText.html(
-      '<span class="del-file">Delete</span><span class="nvm" > Nevermind</span>'
+      '<span class=\'del-file\'>Delete</span><span class=\'nvm\' > Nevermind</span>'
     );
 
     // delete file
@@ -284,7 +293,7 @@ $(document).ready(function() {
         toggleHeader();
       });
     });
-    document.getElementById('delete-file').onclick = e => {
+    document.getElementById('delete-file').onclick = () => {
       FileSender.delete(file.fileId, file.deleteToken).then(() => {
         localStorage.removeItem(file.fileId);
         toggleHeader();
@@ -296,13 +305,12 @@ $(document).ready(function() {
     row.appendChild(name);
     row.appendChild(link);
     row.appendChild(expiry);
-    //popupDiv.appendChild(btn);
     $(popupDiv).append($popupText);
     del.appendChild(popupDiv);
     row.appendChild(del);
 
     // show popup
-    del.addEventListener('click', function(){
+    del.addEventListener('click', function() {
       $popupText.addClass('show');
       $popupText.focus();
     });
diff --git a/public/main.css b/public/main.css
index 6f2bf5d2..bbe1e6ba 100644
--- a/public/main.css
+++ b/public/main.css
@@ -36,7 +36,7 @@ span {
   line-height: 23px;
   width: 630px;
   text-align: center;
-  margin: 0 auto 60px auto;
+  margin: 0 auto 60px;
   color: #0C0C0D;
 }
 
@@ -74,7 +74,7 @@ span {
 #upload-text {
   font-size: 22px;
   color: #737373;
-  margin: 20px 0 30px 0;
+  margin: 20px 0 30px;
 }
 
 #browse {
@@ -82,7 +82,7 @@ span {
   border-radius: 5px;
   font-family: 'SF Pro Text', sans-serif;
   font-size: 15px;
-  color: #FFFFFF;
+  color: #FFF;
   width: 240px;
   height: 44px;
   display: flex;
@@ -111,7 +111,7 @@ td {
   font-size: 15px;
   vertical-align: top;
   color: #4A4A4A;
-  padding: 17px 19px 0 19px;
+  padding: 17px 19px 0;
   line-height: 23px;
 }
 
@@ -212,7 +212,7 @@ tbody {
 .progress-text {
   font-family: 'SF Pro Text', sans-serif;
   font-size: 15px;
-  color: rgba(0,0,0,0.50);
+  color: rgba(0, 0, 0, 0.5);
   letter-spacing: -0.4px;
   margin-top: 24px;
   margin-bottom: 74px;
@@ -265,7 +265,7 @@ tbody {
 
 #link:disabled {
   border: 1px solid #05A700;
-  background: #FFFFFF;
+  background: #FFF;
 }
 
 #copy-btn {
@@ -289,8 +289,8 @@ tbody {
 #delete-file {
   width: 176px;
   height: 44px;
-  background: #FFFFFF;
-  border: 1px solid rgba(12,12,13,0.30);
+  background: #FFF;
+  border: 1px solid rgba(12, 12, 13, 0.3);
   border-radius: 5px;
   font-size: 15px;
   font-family: 'SF Pro Text';
@@ -310,7 +310,7 @@ tbody {
   text-decoration: underline;
 }
 
-/*upload-error*/
+/*    upload-error    */
 #upload-error {
   display: flex;
   justify-content: center;
@@ -324,7 +324,7 @@ tbody {
   margin-top: 5px;
 }
 
-/*unsupported-browser*/
+/*    unsupported-browser   */
 #unsupported-browser {
   display: flex;
   justify-content: center;
@@ -339,7 +339,7 @@ tbody {
   width: 630px;
   text-align: center;
   color: #7D7D7D;
-  margin: 0 auto 23px auto;
+  margin: 0 auto 23px;
 }
 
 #firefox-logo {
@@ -350,14 +350,14 @@ tbody {
   margin-bottom: 181px;
   width: 260px;
   height: 80px;
-  background: #12bc00;
+  background: #12BC00;
   border-radius: 3px;
   cursor: pointer;
   border: none;
-  box-shadow: 0 5px 3px rgb(234,234,234);
+  box-shadow: 0 5px 3px rgb(234, 234, 234);
   font-family: 'Fira Sans';
   font-weight: 500;
-  color: #FFFFFF;
+  color: #FFF;
   font-size: 26px;
   display: flex;
   justify-content: center;
@@ -370,7 +370,7 @@ tbody {
   margin-left: 20.4px;
 }
 
-#dl-firefox-text>span {
+#dl-firefox-text > span {
   font-family: 'Fira Sans';
   font-weight: 300;
   font-size: 18px;
@@ -409,7 +409,7 @@ tbody {
 }
 
 #expired-img {
-  margin: 51px 0 71px 0;
+  margin: 51px 0 71px;
 }
 
 .expired-description {
@@ -418,9 +418,8 @@ tbody {
   line-height: 23px;
   width: 630px;
   text-align: center;
-  font-size: 15px;
   color: #7D7D7D;
-  margin: 0 auto 23px auto;
+  margin: 0 auto 23px;
 }
 
 #download-progress {