diff --git a/src/core/worker.js b/src/core/worker.js
index 0eff8f952..3764b12ed 100644
--- a/src/core/worker.js
+++ b/src/core/worker.js
@@ -709,7 +709,7 @@ class WorkerMessageHandler {
             fileIds: xref.trailer.get("ID") || null,
             startXRef: linearization
               ? startXRef
-              : xref.lastXRefStreamPos ?? startXRef,
+              : (xref.lastXRefStreamPos ?? startXRef),
             filename,
           };
         }
diff --git a/src/display/api.js b/src/display/api.js
index 8cc5bfbd6..02e2bad99 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -294,7 +294,7 @@ function getDocument(src = {}) {
   const enableHWA = src.enableHWA === true;
 
   // Parameters whose default values depend on other parameters.
-  const length = rangeTransport ? rangeTransport.length : src.length ?? NaN;
+  const length = rangeTransport ? rangeTransport.length : (src.length ?? NaN);
   const useSystemFonts =
     typeof src.useSystemFonts === "boolean"
       ? src.useSystemFonts
diff --git a/web/app_options.js b/web/app_options.js
index c1a306237..0ee11eeae 100644
--- a/web/app_options.js
+++ b/web/app_options.js
@@ -482,7 +482,7 @@ class AppOptions {
       }
       options[name] = defaultOnly
         ? defaultOption.value
-        : userOptions[name] ?? defaultOption.value;
+        : (userOptions[name] ?? defaultOption.value);
     }
     return options;
   }
diff --git a/web/l10n.js b/web/l10n.js
index 9b3e23bf8..f86cb0fcc 100644
--- a/web/l10n.js
+++ b/web/l10n.js
@@ -32,7 +32,7 @@ class L10n {
   constructor({ lang, isRTL }, l10n = null) {
     this.#lang = L10n.#fixupLangCode(lang);
     this.#l10n = l10n;
-    this.#dir = isRTL ?? L10n.#isRTL(this.#lang) ? "rtl" : "ltr";
+    this.#dir = (isRTL ?? L10n.#isRTL(this.#lang)) ? "rtl" : "ltr";
   }
 
   _setL10n(l10n) {
diff --git a/web/text_layer_builder.css b/web/text_layer_builder.css
index 9e9f5b6fa..0937130c9 100644
--- a/web/text_layer_builder.css
+++ b/web/text_layer_builder.css
@@ -96,10 +96,11 @@
   }
 
   ::selection {
+    /* stylelint-disable declaration-block-no-duplicate-properties */
     /*#if !MOZCENTRAL*/
     background: rgba(0 0 255 / 0.25);
     /*#endif*/
-    /* stylelint-disable-next-line declaration-block-no-duplicate-properties */
+    /* stylelint-enable declaration-block-no-duplicate-properties */
     background: color-mix(in srgb, AccentColor, transparent 75%);
   }