diff --git a/modules/browser/chromium.nix b/modules/browser/chromium.nix
index f40428b..0ed14b3 100644
--- a/modules/browser/chromium.nix
+++ b/modules/browser/chromium.nix
@@ -14,6 +14,7 @@
       "aeblfdkhhhdcdjpifhhbdiojplfjncoa" # 1Password
       "eimadpbcbfnmbkopoojfekhnkhdbieeh" # dark reader
       "mnjggcdmjocbbbhaepdhchncahnbgone" # sponsorblock
+      "fnaicdffflnofjppbagibeoednhnbjhg" # floccus bookmark sync
     ];
   };
 }
diff --git a/modules/browser/firefox.nix b/modules/browser/firefox.nix
index 4fa39b9..cc5d107 100644
--- a/modules/browser/firefox.nix
+++ b/modules/browser/firefox.nix
@@ -28,6 +28,10 @@
         installation_mode = "force_installed";
         install_url = "https://addons.mozilla.org/firefox/downloads/latest/pywalfox/latest.xpi";
       };
+      "floccus@handmadeideas.org" = {
+        installation_mode = "force_installed";
+        install_url = "https://addons.mozilla.org/firefox/downloads/latest/floccus/latest.xpi";
+      };
     };
 
     # Privacy & Security