diff --git a/.eslintrc.json b/.eslintrc.json
index 78fec27c..a2de6671 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -23,6 +23,7 @@
         "eqeqeq": "error",
         "func-names": ["error", "always"],
         "guard-for-in": "error",
+        "new-parens": "error",
         "no-case-declarations": "error",
         "no-const-assign": "error",
         "no-constant-condition": "off",
@@ -31,6 +32,7 @@
         "no-prototype-builtins": "error",
         "no-shadow": ["error", {"builtinGlobals": false}],
         "no-undef": "error",
+        "no-unexpected-multiline": "error",
         "no-unneeded-ternary": "error",
         "no-unused-vars": ["error", {"vars": "local", "args": "after-used", "argsIgnorePattern": "^_", "caughtErrors": "none"}],
         "no-unused-expressions": "error",
@@ -40,6 +42,7 @@
         "quotes": ["error", "single", "avoid-escape"],
         "require-atomic-updates": "off",
         "semi": "error",
+        "wrap-iife": ["error", "inside"],
 
         // Whitespace rules
         "brace-style": ["error", "1tbs", {"allowSingleLine": true}],
@@ -53,6 +56,7 @@
         "comma-spacing": ["error", { "before": false, "after": true }],
         "computed-property-spacing": ["error", "never"],
         "func-call-spacing": ["error", "never"],
+        "function-paren-newline": ["error", "multiline-arguments"],
         "generator-star-spacing": ["error", "before"],
         "key-spacing": ["error", {"beforeColon": false, "afterColon": true, "mode": "strict"}],
         "keyword-spacing": ["error", {"before": true, "after": true}],
@@ -61,6 +65,11 @@
         "object-curly-spacing": ["error", "never"],
         "rest-spread-spacing": ["error", "never"],
         "semi-spacing": ["error", {"before": false, "after": true}],
+        "space-before-function-paren": ["error", {
+            "anonymous": "never",
+            "named": "never",
+            "asyncArrow": "always"
+        }],
         "space-in-parens": ["error", "never"],
         "space-unary-ops": "error",
         "spaced-comment": ["error", "always"],
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index ed01c8df..43fa8190 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -896,7 +896,9 @@ class Backend {
                 await Backend._focusTab(tab);
                 if (queryParams.query) {
                     await new Promise((resolve) => chrome.tabs.sendMessage(
-                        tab.id, {action: 'searchQueryUpdate', params: {text: queryParams.query}}, resolve
+                        tab.id,
+                        {action: 'searchQueryUpdate', params: {text: queryParams.query}},
+                        resolve
                     ));
                 }
                 return true;
diff --git a/ext/fg/js/source.js b/ext/fg/js/source.js
index 0b21b5cc..b3119d40 100644
--- a/ext/fg/js/source.js
+++ b/ext/fg/js/source.js
@@ -118,7 +118,8 @@ class TextSourceRange {
         return !(
             style.visibility === 'hidden' ||
             style.display === 'none' ||
-            parseFloat(style.fontSize) === 0);
+            parseFloat(style.fontSize) === 0
+        );
     }
 
     static getRubyElement(node) {