diff --git a/src/pyj/dom.pyj b/src/pyj/dom.pyj
index 68dc471c01..e05b311b0f 100644
--- a/src/pyj/dom.pyj
+++ b/src/pyj/dom.pyj
@@ -22,6 +22,7 @@ simple_vendor_prefixes = {
     'column-gap': v"['webkit', 'moz']",
     'column-width': v"['webkit', 'moz']",
     'column-rule': v"['webkit', 'moz']",
+    'column-fill': v"['moz']",
 }
 
 def set_css(elem, **kw):
diff --git a/src/pyj/read_book/paged_mode.pyj b/src/pyj/read_book/paged_mode.pyj
index 135f00b0be..c07e3b343f 100644
--- a/src/pyj/read_book/paged_mode.pyj
+++ b/src/pyj/read_book/paged_mode.pyj
@@ -150,7 +150,7 @@ def layout(is_single_page):
     col_and_gap = col_width + gap
 
     set_css(document.body, column_gap=gap + 'px', column_width=col_width + 'px', column_rule='0px inset blue',
-        min_width='0', max_width='none', min_height='0', max_height='none',
+        min_width='0', max_width='none', min_height='0', max_height='100vh', column_fill='auto',
         margin='0', border_width='0', padding='0',
         width=screen_width + 'px', height=screen_height + 'px'
     )