new file mode 100644
--- /dev/null
+++ b/js/src/shell/.eslintrc.js
@@ -0,0 +1,12 @@
+"use strict";
+
+module.exports = {
+  "extends": [
+    "../../../toolkit/.eslintrc.js"
+  ],
+
+  "rules": {
+    // SpiderMonkey's style doesn't match any of the possible options.
+    "brace-style": "off",
+  }
+};

--- a/js/src/shell/ModuleLoader.js
+++ b/js/src/shell/ModuleLoader.js
@@ -1,12 +1,14 @@
 /* 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/. */
 
+/* global getModuleLoadPath setModuleResolveHook parseModule os */
+
 // A basic synchronous module loader for testing the shell.
 {
 // Save standard built-ins before scripts can modify them.
 const ArrayPrototypeJoin = Array.prototype.join;
 const MapPrototypeGet = Map.prototype.get;
 const MapPrototypeHas = Map.prototype.has;
 const MapPrototypeSet = Map.prototype.set;
 const ObjectDefineProperty = Object.defineProperty;
@@ -49,20 +51,23 @@ const ReflectLoader = new class {
 
         // Remove the drive letter, if present.
         let isalpha = c => ("A" <= c && c <= "Z") || ("a" <= c && c <= "z");
         let drive = "";
         if (path.length > 2 && isalpha(path[0]) && path[1] === ":" && path[2] === "\\") {
             drive = ReflectApply(StringPrototypeSubstring, path, [0, 2]);
             path = ReflectApply(StringPrototypeSubstring, path, [2]);
         }
+#endif
 
-        const pathsep = "\\";
+        const pathsep =
+#ifdef XP_WIN
+        "\\";
 #else
-        const pathsep = "/";
+        "/";
 #endif
 
         let n = 0;
         let components = [];
 
         // Normalize the path by removing redundant path components.
         // NB: See above for why we don't call String.prototype.split here.
         let lastSep = 0;

--- a/tools/lint/eslint/eslint-plugin-mozilla/lib/processors/self-hosted.js
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/processors/self-hosted.js
@@ -3,17 +3,17 @@
  *
  * 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/.
  */
 
 "use strict";
 
-const selfHostedRegex = /js\/src\/builtin\/.*?\.js$/;
+const selfHostedRegex = /js\/src\/(?:builtin|shell)\/.*?\.js$/;
 const macroRegex = /\s*\#(if|ifdef|else|elif|endif|include|define|undef).*/;
 
 module.exports = {
   preprocess: function(text, filename) {
     if (!selfHostedRegex.test(filename)) {
       return [text];
     }