diff --git a/nix/homeModules/common/zen-browser.nix b/nix/homeModules/common/zen-browser.nix
index be5ded5b..4b2e2fbc 100644
--- a/nix/homeModules/common/zen-browser.nix
+++ b/nix/homeModules/common/zen-browser.nix
@@ -59,6 +59,9 @@ in
     #   diff .zen/default/prefs.js{.bk,}
     profiles.default = {
       settings = {
+        # Zen specific
+        "zen.theme.content-element-separation" = 0; # Remove "borders" around window
+
         "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
         "browser.tabs.loadInBackground" = true;
         "browser.ctrlTab.sortByRecentlyUsed" = false;