diff --git a/l10n/ar/viewer.ftl b/l10n/ar/viewer.ftl
index 40b3d2e14..553353edc 100644
--- a/l10n/ar/viewer.ftl
+++ b/l10n/ar/viewer.ftl
@@ -39,9 +39,24 @@ pdfjs-open-file-button-label = افتح
 pdfjs-print-button =
     .title = اطبع
 pdfjs-print-button-label = اطبع
+pdfjs-save-button =
+    .title = احفظ
+pdfjs-save-button-label = احفظ
+# Used in Firefox for Android as a tooltip for the download button (“download” is a verb).
+pdfjs-download-button =
+    .title = نزّل
+# Used in Firefox for Android as a label for the download button (“download” is a verb).
+# Length of the translation matters since we are in a mobile context, with limited screen estate.
+pdfjs-download-button-label = نزّل
 pdfjs-bookmark-button =
     .title = الصفحة الحالية (عرض URL من الصفحة الحالية)
 pdfjs-bookmark-button-label = الصفحة الحالية
+# Used in Firefox for Android.
+pdfjs-open-in-app-button =
+    .title = افتح في تطبيق
+# Used in Firefox for Android.
+# Length of the translation matters since we are in a mobile context, with limited screen estate.
+pdfjs-open-in-app-button-label = افتح في تطبيق
 
 ##  Secondary toolbar and context menu
 
@@ -201,6 +216,7 @@ pdfjs-find-next-button =
 pdfjs-find-next-button-label = التالي
 pdfjs-find-highlight-checkbox = أبرِز الكل
 pdfjs-find-match-case-checkbox-label = طابق حالة الأحرف
+pdfjs-find-match-diacritics-checkbox-label = طابِق الحركات
 pdfjs-find-entire-word-checkbox-label = كلمات كاملة
 pdfjs-find-reached-top = تابعت من الأسفل بعدما وصلت إلى بداية المستند
 pdfjs-find-reached-bottom = تابعت من الأعلى بعدما وصلت إلى نهاية المستند
@@ -256,9 +272,18 @@ pdfjs-web-fonts-disabled = خطوط الوب مُعطّلة: تعذّر استخ
 ## Editing
 
 
+## Remove button for the various kind of editor.
+
+
+##
+
+
 ## Alt-text dialog
 
 
 ## Editor resizers
 ## This is used in an aria label to help to understand the role of the resizer.
 
+
+## Color picker
+
diff --git a/l10n/en-CA/viewer.ftl b/l10n/en-CA/viewer.ftl
index e95afe96a..2319cc9dd 100644
--- a/l10n/en-CA/viewer.ftl
+++ b/l10n/en-CA/viewer.ftl
@@ -286,6 +286,12 @@ pdfjs-editor-ink-button-label = Draw
 pdfjs-editor-stamp-button =
     .title = Add or edit images
 pdfjs-editor-stamp-button-label = Add or edit images
+
+## Remove button for the various kind of editor.
+
+
+##
+
 # Editor Parameters
 pdfjs-editor-free-text-color-input = Colour
 pdfjs-editor-free-text-size-input = Size
@@ -309,3 +315,22 @@ pdfjs-ink-canvas =
 ## Editor resizers
 ## This is used in an aria label to help to understand the role of the resizer.
 
+
+## Color picker
+
+# This means "Color used to highlight text"
+pdfjs-editor-highlight-colorpicker-label = Highlight colour
+pdfjs-editor-colorpicker-button =
+    .title = Change colour
+pdfjs-editor-colorpicker-dropdown =
+    .aria-label = Colour choices
+pdfjs-editor-colorpicker-yellow =
+    .title = Yellow
+pdfjs-editor-colorpicker-green =
+    .title = Green
+pdfjs-editor-colorpicker-blue =
+    .title = Blue
+pdfjs-editor-colorpicker-pink =
+    .title = Pink
+pdfjs-editor-colorpicker-red =
+    .title = Red
diff --git a/l10n/fur/viewer.ftl b/l10n/fur/viewer.ftl
index 399380cf2..5c6ba62ba 100644
--- a/l10n/fur/viewer.ftl
+++ b/l10n/fur/viewer.ftl
@@ -301,8 +301,9 @@ pdfjs-editor-ink-button-label = Dissen
 pdfjs-editor-stamp-button =
     .title = Zonte o modifiche imagjins
 pdfjs-editor-stamp-button-label = Zonte o modifiche imagjins
-pdfjs-editor-remove-button =
-    .title = Gjave
+pdfjs-editor-highlight-button =
+    .title = Evidenzie
+pdfjs-editor-highlight-button-label = Evidenzie
 
 ## Remove button for the various kind of editor.
 
diff --git a/l10n/it/viewer.ftl b/l10n/it/viewer.ftl
index 389a2e0ca..83eee8d60 100644
--- a/l10n/it/viewer.ftl
+++ b/l10n/it/viewer.ftl
@@ -332,6 +332,8 @@ pdfjs-editor-ink-opacity-input = Opacità
 pdfjs-editor-stamp-add-image-button =
     .title = Aggiungi immagine
 pdfjs-editor-stamp-add-image-button-label = Aggiungi immagine
+# This refers to the thickness of the line used for free highlighting (not bound to text)
+pdfjs-editor-free-highlight-thickness-input = Spessore
 pdfjs-free-text =
     .aria-label = Editor di testo
 pdfjs-free-text-default-content = Inizia a digitare…