--- a/.eslintignore
+++ b/.eslintignore
@@ -59,17 +59,16 @@ b2g/locales/en-US/b2g-l10n.js
 browser/app/**
 browser/base/content/browser-social.js
 browser/base/content/nsContextMenu.js
 browser/base/content/sanitizeDialog.js
 browser/base/content/test/general/file_csp_block_all_mixedcontent.html
 browser/base/content/test/urlbar/file_blank_but_not_blank.html
 browser/base/content/newtab/**
 browser/components/downloads/**
-browser/components/feeds/**
 browser/components/privatebrowsing/**
 browser/components/sessionstore/**
 browser/components/tabview/**
 browser/components/translation/**
 # generated files in cld2
 browser/components/translation/cld2/cld-worker.js
 browser/extensions/pdfjs/**
 # generated or library files in pocket

--- a/browser/components/feeds/FeedConverter.js
+++ b/browser/components/feeds/FeedConverter.js
@@ -1,9 +1,9 @@
-/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */ 
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 Components.utils.import("resource://gre/modules/debug.js");
 Components.utils.import("resource://gre/modules/Services.jsm");
 
@@ -222,17 +222,17 @@ FeedConverter.prototype = {
             case "client":
             case "default":
               try {
                 let title = feed.title ? feed.title.plainText() : "";
                 let desc = feed.subtitle ? feed.subtitle.plainText() : "";
                 let feedReader = safeGetCharPref(getPrefActionForType(feedType), "bookmarks");
                 feedService.addToClientReader(result.uri.spec, title, desc, feed.type, feedReader);
                 return;
-              } catch(ex) { /* fallback to preview mode */ }
+              } catch (ex) { /* fallback to preview mode */ }
           }
         }
       }
 
       let ios =
           Cc["@mozilla.org/network/io-service;1"].
           getService(Ci.nsIIOService);
       let chromeChannel;

--- a/browser/components/feeds/FeedWriter.js
+++ b/browser/components/feeds/FeedWriter.js
@@ -606,17 +606,17 @@ FeedWriter.prototype = {
   _setAlwaysUseCheckedState(feedType) {
     let checkbox = this._document.getElementById("alwaysUse");
     if (checkbox) {
       let alwaysUse = false;
       try {
         if (Services.prefs.getCharPref(getPrefActionForType(feedType)) != "ask")
           alwaysUse = true;
       }
-      catch(ex) { }
+      catch (ex) { }
       this._setCheckboxCheckedState(checkbox, alwaysUse);
     }
   },
 
   _setSubscribeUsingLabel() {
     let stringLabel = "subscribeFeedUsing";
     switch (this._getFeedType()) {
       case Ci.nsIFeed.TYPE_VIDEO:
@@ -944,17 +944,17 @@ FeedWriter.prototype = {
     prefs.addObserver(PREF_AUDIO_SELECTED_READER, this, false);
     prefs.addObserver(PREF_AUDIO_SELECTED_WEB, this, false);
     prefs.addObserver(PREF_AUDIO_SELECTED_APP, this, false);
 
     this._mm.addMessageListener("FeedWriter:SetApplicationLauncherMenuItem", this);
   },
 
   receiveMessage(msg) {
-    switch(msg.name) {
+    switch (msg.name) {
       case "FeedWriter:SetApplicationLauncherMenuItem":
         let menuItem = null;
 
         if (msg.data.type == "DefaultAppMenuItem") {
           menuItem = this._defaultHandlerMenuItem;
         } else {
           // Most likely SelectedAppMenuItem
           menuItem = this._selectedAppMenuItem;

--- a/browser/components/feeds/WebContentConverter.js
+++ b/browser/components/feeds/WebContentConverter.js
@@ -915,17 +915,17 @@ WebContentConverterRegistrarContent.prot
     }).filter(child => !!child)
       .sort();
 
     // now register them
     for (num of nums) {
       let branch = ps.getBranch(PREF_CONTENTHANDLERS_BRANCH + num + ".");
       try {
         this._registerContentHandlerHavingBranch(branch);
-      } catch(ex) {
+      } catch (ex) {
         // do nothing, the next branch might have values
       }
     }
   },
 
   _typeIsRegistered(contentType, uri) {
     return this._contentTypes[contentType]
                .some(e => e.uri == uri);

--- a/browser/components/feeds/content/subscribe.js
+++ b/browser/components/feeds/content/subscribe.js
@@ -3,17 +3,17 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 var SubscribeHandler = {
   /**
    * The nsIFeedWriter object that produces the UI
    */
   _feedWriter: null,
-  
+
   init: function SH_init() {
     this._feedWriter = new BrowserFeedWriter();
   },
 
   writeContent: function SH_writeContent() {
     this._feedWriter.writeContent();
   },
 

--- a/browser/components/feeds/test/test_bug436801.html
+++ b/browser/components/feeds/test/test_bug436801.html
@@ -81,29 +81,29 @@ function checkNode(node, schema) {
     var text = schema.shift();
     is(node.data, text, "Text should match");
     return;
   }
   // type == Node.ELEMENT_NODE
   var tag = schema.shift();
   is(node.localName, tag, "Element should have expected tag");
   while (schema.length) {
-    var val = schema.shift();
+    let val = schema.shift();
     if (Array.isArray(val))
       var childSchema = val;
     else
       var attrSchema = val;
   }
   if (attrSchema) {
     var nsTable = {
       xml: "http://www.w3.org/XML/1998/namespace",
     };
     for (var name in attrSchema) {
       var [ns, nsName] = name.split(":");
-      var val = nsName ? node.getAttributeNS(nsTable[ns], nsName) :
+      let val = nsName ? node.getAttributeNS(nsTable[ns], nsName) :
                 node.getAttribute(name);
       is(val, attrSchema[name], "Attribute " + name + " should match");
     }
   }
   if (childSchema) {
     var numChildren = node.childNodes.length;
     is(childSchema.length, numChildren,
        "Element should have expected number of children");

--- a/browser/components/feeds/test/test_registerHandler.html
+++ b/browser/components/feeds/test/test_registerHandler.html
@@ -23,17 +23,17 @@ https://bugzilla.mozilla.org/show_bug.cg
   function testRegisterHandler(aIsProtocol, aTxt, aUri, aTitle)
   {
     try {
       if (aIsProtocol)
         navigator.registerProtocolHandler(aTxt, aUri, aTitle);
       else
         navigator.registerContentHandler(aTxt, aUri, aTitle);
     }
-    catch(e) {
+    catch (e) {
       return false;
     }
 
     return true;
   }
 
   ok(navigator.registerProtocolHandler, "navigator.registerProtocolHandler should be defined");
   ok(navigator.registerContentHandler, "navigator.registerContentHandler should be defined");
@@ -56,20 +56,20 @@ https://bugzilla.mozilla.org/show_bug.cg
 
   // restriction to http(s) for the uri of the handler (bug 401343)
   // https should work (http already tested in the generic case)
   is(testRegisterHandler(true, "foo", "https://mochi.test:8888/%s", "Foo handler"), true, "registering a foo protocol handler with https scheme should work");
   is(testRegisterHandler(false, "application/rss+xml", "https://mochi.test:8888/%s", "Foo handler"), true, "registering a foo content handler with https scheme should work");
   // ftp should not work
   is(testRegisterHandler(true, "foo", "ftp://mochi.test:8888/%s", "Foo handler"), false, "registering a foo protocol handler with ftp scheme should not work");
   is(testRegisterHandler(false, "application/rss+xml", "ftp://mochi.test:8888/%s", "Foo handler"), false, "registering a foo content handler with ftp scheme should not work");
-  // chrome should not work 
+  // chrome should not work
   is(testRegisterHandler(true, "foo", "chrome://mochi.test:8888/%s", "Foo handler"), false, "registering a foo protocol handler with chrome scheme should not work");
   is(testRegisterHandler(false, "application/rss+xml", "chrome://mochi.test:8888/%s", "Foo handler"), false, "registering a foo content handler with chrome scheme should not work");
-  // foo should not work 
+  // foo should not work
   is(testRegisterHandler(true, "foo", "foo://mochi.test:8888/%s", "Foo handler"), false, "registering a foo protocol handler with foo scheme should not work");
   is(testRegisterHandler(false, "application/rss+xml", "foo://mochi.test:8888/%s", "Foo handler"), false, "registering a foo content handler with foo scheme should not work");
 
   // for security reasons, protocol handlers should never be registered for some schemes (chrome, vbscript, ...) (bug 402788)
   is(testRegisterHandler(true, "chrome", "http://mochi.test:8888/%s", "chrome handler"), false, "registering a chrome protocol handler should not work");
   is(testRegisterHandler(true, "vbscript", "http://mochi.test:8888/%s", "vbscript handler"), false, "registering a vbscript protocol handler should not work");
   is(testRegisterHandler(true, "javascript", "http://mochi.test:8888/%s", "javascript handler"), false, "registering a javascript protocol handler should not work");
   is(testRegisterHandler(true, "moz-icon", "http://mochi.test:8888/%s", "moz-icon handler"), false, "registering a moz-icon protocol handler should not work");