Made the button's nice on the notice.

content.css

@@ -0,0 +1,66 @@
+#sponsorSkipNotice {
+    min-height: 120px;
+    min-width: 400px;
+    background-color: rgba(153, 153, 153, 0.8);
+    position: absolute;
+    z-index: 1;
+}
+
+#sponsorSkipMessage {
+    font-size: 18px;
+    color: #000000;
+    text-align: center;
+    margin-top: 10px;
+}
+
+.sponsorSkipButton {
+	background-color:#44c767;
+	-moz-border-radius:28px;
+	-webkit-border-radius:28px;
+	border-radius:28px;
+	border:1px solid #18ab29;
+	display:inline-block;
+	cursor:pointer;
+	color:#ffffff;
+	font-family:Arial;
+	font-size:16px;
+	padding:8px 15px;
+	text-decoration:none;
+    text-shadow:0px 0px 0px #2f6627;
+    
+    margin-top: 5px;
+    margin-right: 15px;
+}
+.sponsorSkipButton:hover {
+	background-color:#5cbf2a;
+}
+.sponsorSkipButton:active {
+	position:relative;
+	top:1px;
+}
+
+.sponsorSkipDontShowButton {
+	-moz-box-shadow:inset 0px 1px 0px 0px #cf866c;
+	-webkit-box-shadow:inset 0px 1px 0px 0px #cf866c;
+	box-shadow:inset 0px 1px 0px 0px #cf866c;
+	background-color:#d0451b;
+	-moz-border-radius:3px;
+	-webkit-border-radius:3px;
+	border-radius:3px;
+	border:1px solid #942911;
+	display:inline-block;
+	cursor:pointer;
+	color:#ffffff;
+	font-family:Arial;
+	font-size:13px;
+	padding:6px 24px;
+	text-decoration:none;
+	text-shadow:0px 1px 0px #854629;
+}
+.sponsorSkipDontShowButton:hover {
+	background-color:#bc3315;
+}
+.sponsorSkipDontShowButton:active {
+	position:relative;
+	top:1px;
+}

content.js

@@ -132,49 +132,34 @@ function openSkipNotice(){
   }
 
   var noticeElement = document.createElement("div");
+  noticeElement.id = "sponsorSkipNotice";
 
-  noticeElement.id = 'sponsorSkipNotice'
-  noticeElement.style.minHeight = "100px";
-  noticeElement.style.minWidth = "400px";
-  noticeElement.style.backgroundColor = "rgba(153, 153, 153, 0.8)";
-  noticeElement.style.fontSize = "24px";
-  noticeElement.style.position = "absolute"
-  noticeElement.style.zIndex = "1";
-
-	var noticeMessage = document.createElement("p");
+  var noticeMessage = document.createElement("p");
+  noticeMessage.id = "sponsorSkipMessage";
 	noticeMessage.innerText = "Hey, you just skipped a sponsor!";
-  noticeMessage.style.fontSize = "18px";
-  noticeMessage.style.color = "#000000";
-  noticeMessage.style.textAlign = "center";
-  noticeMessage.style.marginTop = "10px";
 
   var buttonContainer = document.createElement("div");
   buttonContainer.setAttribute("align", "center");
 
   var goBackButton = document.createElement("button");
-	goBackButton.innerText = "Go back";
-  goBackButton.style.fontSize = "13px";
-  goBackButton.style.color = "#000000";
-  goBackButton.style.marginTop = "5px";
+  goBackButton.innerText = "Go back";
+  goBackButton.className = "sponsorSkipButton";
   goBackButton.addEventListener("click", goBackToPreviousTime);
 
   var hideButton = document.createElement("button");
 	hideButton.innerText = "Hide";
-  hideButton.style.fontSize = "13px";
-  hideButton.style.color = "#000000";
-  hideButton.style.marginTop = "5px";
+  hideButton.className = "sponsorSkipButton";
   hideButton.addEventListener("click", closeSkipNotice);
 
   var dontShowAgainButton = document.createElement("button");
 	dontShowAgainButton.innerText = "Don't Show This Again";
-  dontShowAgainButton.style.fontSize = "13px";
-  dontShowAgainButton.style.color = "#000000";
-  dontShowAgainButton.style.marginTop = "5px";
+  dontShowAgainButton.className = "sponsorSkipDontShowButton";
   dontShowAgainButton.addEventListener("click", dontShowNoticeAgain);
 
   buttonContainer.appendChild(goBackButton);
   buttonContainer.appendChild(hideButton);
   buttonContainer.appendChild(document.createElement("br"));
+  buttonContainer.appendChild(document.createElement("br"));
   buttonContainer.appendChild(dontShowAgainButton);
 
   noticeElement.appendChild(noticeMessage);

manifest.json

@@ -10,6 +10,9 @@
       "js": [
         "content-config.js",
         "content.js"
+      ],
+      "css": [
+        "content.css"
       ]
     }
   ],