Fixed Firefox panel links and tabs.js error

drivers/firefox/data/js/panel.js

@@ -27,11 +27,13 @@
 
 				a.setAttribute('href', '#');
 
+				(function(appName) {
 					a.addEventListener('click', function(e) {
 						e.preventDefault();
 
 						self.port.emit('goToUrl', 'applications/' + appName.toLowerCase().replace(/ /g, '-').replace(/[^\w-]/g, ''));
 					});
+				}(appName));
 
 				img.setAttribute('src',    'images/icons/' + appName + '.png');
 				img.setAttribute('height', '16');
@@ -58,11 +60,13 @@
 
 					a.setAttribute('href', '#');
 
+					(function(appName) {
 						a.addEventListener('click', function(e) {
 							e.preventDefault();
 
 							self.port.emit('goToUrl', 'categories/' + message.categories[cat]);
 						});
+					}(appName));
 
 					label.setAttribute('class', 'category');
 

drivers/firefox/data/js/tab.js

@@ -1,7 +1,8 @@
 (function() {
 	var lastEnv = [];
 
-	if ( document.contentType === 'text/html' ) {
+	try {
+		if ( document && document.documentElement && document.contentType === 'text/html' ) {
 			var
 				html = document.documentElement.outerHTML
 				env = [];
@@ -28,4 +29,5 @@
 				});
 			}, 1000);
 		}
+	} catch (e) { }
 }());

drivers/firefox/package.json

@@ -8,7 +8,7 @@
   "description": "Identifies software on the web",
   "author": "Elbert Alias",
   "license": "GPLv3",
-  "version": "3.0.4",
+  "version": "3.0.5",
 	"main": "driver",
 	"preferences": [{
 		"name": "tracking",