diff --git a/common.js b/common.js
index fe0b4a0..bbee2e4 100644
--- a/common.js
+++ b/common.js
@@ -14,7 +14,8 @@ var prefs = {
   custom: {},
   mode: 'blacklist',
   color: '#ffa643',
-  cache: true
+  cache: true,
+  exactMatch: false
 };
 chrome.storage.local.get(prefs, ps => {
   Object.assign(prefs, ps);
@@ -160,13 +161,27 @@ function match({url, tabId}) {
   if (prefs.mode === 'blacklist') {
     if (prefs.blacklist.length) {
       const h = hostname(url);
-      return prefs.blacklist.some(s => s === h);
+      return prefs.blacklist.some(s => () => {
+        if (s === h) {
+          return true;
+        }
+        else if (prefs.exactMatch === false) {
+          return s.endsWith(h) || h.endsWith(s);
+        }
+      });
     }
   }
   else if (prefs.mode === 'whitelist') {
     if (prefs.whitelist.length) {
       const h = hostname(url);
-      return prefs.whitelist.some(s => s === h) === false;
+      return prefs.whitelist.some(s => {
+        if (s === h) {
+          return true;
+        }
+        else if (prefs.exactMatch === false) {
+          return s.endsWith(h) || h.endsWith(s);
+        }
+      }) === false;
     }
     else {
       return true;
diff --git a/data/options/index.html b/data/options/index.html
index 6d3e285..2befbd8 100644
--- a/data/options/index.html
+++ b/data/options/index.html
@@ -45,6 +45,9 @@
     <tr>
       <td><label><input type="checkbox" id="cache"> Use caching to improve performance (recommended value is true). Uncheck this option only if you are using the custom mode and also you need the user-agent string to be altered from the provided list on every single request.</label></td>
     </tr>
+    <tr>
+      <td><label><input type="checkbox" id="exactMatch"> Use exact matching (if checked, you will need to insert all sub-domains in the white-list and black-list modes to be considered. If unchecked, all the sub-domains are passing the matching condition (e.g: www.google.com passes the matching if google.com is in the list))</label></td>
+    </tr>
     <tr>
       <td><label><input type="checkbox" id="faqs"> Open FAQs page on updates</label></td>
     </tr>
diff --git a/data/options/index.js b/data/options/index.js
index 4fbf0bc..ba923a9 100644
--- a/data/options/index.js
+++ b/data/options/index.js
@@ -29,6 +29,7 @@ function save() {
   }
 
   chrome.storage.local.set({
+    exactMatch: document.getElementById('exactMatch').checked,
     faqs: document.getElementById('faqs').checked,
     cache: document.getElementById('cache').checked,
     blacklist: prepare(document.getElementById('blacklist').value),
@@ -43,6 +44,7 @@ function save() {
 
 function restore() {
   chrome.storage.local.get({
+    exactMatch: false,
     faqs: true,
     cache: true,
     mode: 'blacklist',
@@ -50,6 +52,7 @@ function restore() {
     blacklist: [],
     custom: {}
   }, prefs => {
+    document.getElementById('exactMatch').checked = prefs.exactMatch;
     document.getElementById('faqs').checked = prefs.faqs;
     document.getElementById('cache').checked = prefs.cache;
     document.querySelector(`[name="mode"][value="${prefs.mode}"`).checked = true;