simplify the code and some other tweaks

extension/content.js

@@ -1,8 +1,9 @@
+/* globals gitHubInjection */
 'use strict';
 const path = location.pathname;
 const isDashboard = path === '/';
-const isRepo = /^\/.*\/.*\//.test(location.pathname)
-const isPR = () => /^\/.*\/.*\/pull\/\d+$/.test(location.pathname);
+const isRepo = /^\/[^/]+\/[^/]+/.test(location.pathname);
+const isPR = () => /^\/[^/]+\/[^/]+\/pull\/\d+$/.test(location.pathname);
 const repoName = path.split('/')[2];
 
 function linkifyBranchRefs() {
@@ -15,30 +16,26 @@ function linkifyBranchRefs() {
 }
 
 document.addEventListener('DOMContentLoaded', () => {
-	const username = document.querySelector('meta[name="user-login"]').getAttribute('content');
+	const username = $('meta[name="user-login"]').attr('content');
 
 	if (isDashboard) {
 		// hide other users starring/forking your repos
 		{
 			const hideStarsOwnRepos = () => {
-				const items = Array.from(document.querySelectorAll('#dashboard .news .watch_started, #dashboard .news .fork'));
-
-				for (const item of items) {
-					if (item.querySelector('.title a[href^="/' + username + '"')) {
-						item.style.display = 'none';
-					}
-				}
+				$('#dashboard .news .watch_started, #dashboard .news .fork')
+					.has(`.title a[href^="/${username}"`)
+					.css('display', 'none');
 			};
 
 			hideStarsOwnRepos();
 
 			new MutationObserver(() => hideStarsOwnRepos())
-				.observe(document.querySelector('#dashboard .news'), {childList: true});
+				.observe($('#dashboard .news').get(0), {childList: true});
 		}
 
 		// expand all the news feed pages
 		(function more() {
-			const btn = document.querySelector('.ajax-pagination-btn');
+			const btn = $('.ajax-pagination-btn').get(0);
 
 			if (!btn) {
 				return;

package.json

@@ -7,7 +7,11 @@
   },
   "xo": {
     "envs": [
-      "browser"
+      "browser",
+      "jquery"
+    ],
+    "ignores": [
+      "extension/vendor/**"
     ]
   }
 }