diff --git a/modules/firefox.nix b/modules/firefox.nix
index ca808b9..9211aba 100644
--- a/modules/firefox.nix
+++ b/modules/firefox.nix
@@ -29,9 +29,9 @@
               };
             };
         in listToAttrs [
-          (extension "tree-style-tab" "treestyletab@piro.sakura.ne.jp")
+          # (extension "tree-style-tab" "treestyletab@piro.sakura.ne.jp")
           (extension "ublock-origin" "uBlock0@raymondhill.net")
-          (extension "umatrix" "uMatrix@raymondhill.net")
+          # (extension "umatrix" "uMatrix@raymondhill.net")
           (extension "libredirect" "7esoorv3@alefvanoon.anonaddy.me")
           (extension "clearurls" "{74145f27-f039-47ce-a470-a662b129930a}")
           (extension "mark-my-search" "{3c87dcad-dbbd-4be1-b07b-b6d0739b0aec}")