diff --git a/chrome/content/zotero/import/mendeley/authViewer.js b/chrome/content/zotero/import/mendeley/authViewer.js
index d8e38b1469..c84e6caf3e 100644
--- a/chrome/content/zotero/import/mendeley/authViewer.js
+++ b/chrome/content/zotero/import/mendeley/authViewer.js
@@ -1,21 +1,24 @@
+/* eslint camelcase: ["error", {allow: ["Zotero_File_Interface"]} ] */
+/* global Zotero_File_Interface: false */
+
 Services.scriptloader.loadSubScript("chrome://zotero/content/fileInterface.js", window);
 const { E10SUtils } = ChromeUtils.import("resource://gre/modules/E10SUtils.jsm");
 const URI = `https://api.mendeley.com/oauth/authorize?client_id=5907&redirect_uri=https%3A%2F%2Fzotero-static.s3.amazonaws.com%2Fmendeley_oauth_redirect.html&response_type=code&state=&scope=all`;
 var startTime;
 
-const tryExtractAuthCode = browser => {
+const tryExtractAuthCode = (browser) => {
 	const matchResult = browser.webNavigation.currentURI.spec
 		.match(/mendeley_oauth_redirect.html(?:.*?)(?:\?|&)code=(.*?)(?:&|$)/i);
 	return matchResult ? matchResult[1] : false;
-}
+};
 
-const clearCookies = since => {
+const clearCookies = (since) => {
 	const cookieManager = Cc["@mozilla.org/cookiemanager;1"].getService(Ci.nsICookieManager);
 	const sinceμs = since * 1000;
 	const cookiesSince = cookieManager.getCookiesSince(sinceμs);
 	Zotero.debug(`Deleting ${cookiesSince.length} cookies created during Mendeley Auth (last ${(Date.now() - since)}ms)`);
 	cookieManager.removeAllSince(sinceμs);
-}
+};
 
 
 window.addEventListener('unload', () => {
@@ -32,11 +35,11 @@ window.addEventListener("load", () => {
 
 	startTime = Date.now();
 
-	browser.addEventListener("pagetitlechanged", event => {
+	browser.addEventListener("pagetitlechanged", (_event) => {
 		const mendeleyCode = tryExtractAuthCode(browser);
 		if (mendeleyCode) {
 			window.close();
-			Zotero_File_Interface.showImportWizard({ mendeleyCode })
+			Zotero_File_Interface.showImportWizard({ mendeleyCode });
 		}
 		document.title = browser.contentTitle;
 	});
diff --git a/chrome/content/zotero/standalone/basicViewer.js b/chrome/content/zotero/standalone/basicViewer.js
index c46c6c918a..c150f27bb3 100644
--- a/chrome/content/zotero/standalone/basicViewer.js
+++ b/chrome/content/zotero/standalone/basicViewer.js
@@ -29,7 +29,8 @@
 
 var browser;
 
-window.addEventListener("load", /*async */function() {
+window.addEventListener("load", /*async */function () {
+	browser = document.querySelector('browser');
 	ensureBrowserType('content');
 	
 	/*