diff --git a/src/contents/dark_mode/_support_org.scss b/src/contents/dark_mode/_support_org.scss
index c719dbd..41c9cd4 100644
--- a/src/contents/dark_mode/_support_org.scss
+++ b/src/contents/dark_mode/_support_org.scss
@@ -158,7 +158,7 @@
   }
 
   .sumo-button.secondary-button {
-    border-color: none !important;
+    border-color: transparent !important;
   }
   .mzp-c-menu-panel {
     border-color: var(--in-content-button-background-hover) !important;
diff --git a/src/library/_contents.scss b/src/library/_contents.scss
index 1551714..0e1dda3 100644
--- a/src/library/_contents.scss
+++ b/src/library/_contents.scss
@@ -27,7 +27,7 @@
     }
 
     /*= Proton ===============================================================*/
-    @inlclude Option("userContent.page.proton") {
+    @include Option("userContent.page.proton") {
       @import "proton";
       @import "proton_contents";
     }
diff --git a/src/library/_proton_contents.scss b/src/library/_proton_contents.scss
index 701f76c..dc62bbb 100644
--- a/src/library/_proton_contents.scss
+++ b/src/library/_proton_contents.scss
@@ -145,7 +145,7 @@ menuitem[type="checkbox"]:focus > .menu-iconic-left > .menu-iconic-icon {
   outline-offset: var(--focus-outline-offset, 2px) !important;
 }
 
-@inclue Contrast {
+@include Contrast {
   menuitem[type="checkbox"]:not([disabled="true"]) > .menu-iconic-left > .menu-iconic-icon {
     /* color will set the border-color on the check due to how HCM works for in-content pages. */
     color: var(--checkbox-checked-border-color, color-mix(in srgb, -moz-accent-color 4%, Field)) !important;
diff --git a/src/theme/proton_chrome/_page_info.scss b/src/theme/proton_chrome/_page_info.scss
index 1e38bbf..e9e80bc 100644
--- a/src/theme/proton_chrome/_page_info.scss
+++ b/src/theme/proton_chrome/_page_info.scss
@@ -47,7 +47,7 @@
   #viewGroup > radio > .radio-label-box {
     /* Overwrite */
     margin: 0 !important;
-    padding: 0 6 !important;
+    padding: 0 6px !important;
   }
   @include OS($mac) {
     #viewGroup > radio > .radio-label-box {
diff --git a/src/theme/proton_chrome/_proton_commons.scss b/src/theme/proton_chrome/_proton_commons.scss
index e3c0fcf..2fe65ef 100644
--- a/src/theme/proton_chrome/_proton_commons.scss
+++ b/src/theme/proton_chrome/_proton_commons.scss
@@ -120,7 +120,7 @@
     border-color: transparent !important;
   }
 
-  @inclue Contrast {
+  @include Contrast {
     xul|button[default]:not([disabled="true"]):hover {
       border-color: currentColor !important;
     }
diff --git a/userChrome.css b/userChrome.css
index 4eaaf27..5e0295a 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -1472,7 +1472,7 @@
       border-color: transparent !important;
     }
 
-    @inclue Contrast {
+    @media (prefers-contrast) {
       xul|button[default]:not([disabled="true"]):hover {
         border-color: currentColor !important;
       }
@@ -2059,7 +2059,7 @@
     #viewGroup > radio > .radio-label-box {
       /* Overwrite */
       margin: 0 !important;
-      padding: 0 6 !important;
+      padding: 0 6px !important;
     }
 
     @supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled") {
diff --git a/userContent.css b/userContent.css
index 05e71b8..e4b98ab 100644
--- a/userContent.css
+++ b/userContent.css
@@ -1090,7 +1090,7 @@
       }
 
       .sumo-button.secondary-button {
-        border-color: none !important;
+        border-color: transparent !important;
       }
 
       .mzp-c-menu-panel {
@@ -2199,7 +2199,7 @@
       }
 
       /*= Proton ===============================================================*/
-      @inlclude Option("userContent.page.proton") {
+      @supports -moz-bool-pref("userContent.page.proton") {
         :root {
           --organizer-color: -moz-DialogText;
           --organizer-deemphasized-color: GrayText;
@@ -2730,7 +2730,7 @@
           outline-offset: var(--focus-outline-offset, 2px) !important;
         }
 
-        @inclue Contrast {
+        @media (prefers-contrast) {
           menuitem[type="checkbox"]:not([disabled="true"]) > .menu-iconic-left > .menu-iconic-icon {
             /* color will set the border-color on the check due to how HCM works for in-content pages. */
             color: var(--checkbox-checked-border-color, color-mix(in srgb, -moz-accent-color 4%, Field)) !important;