diff --git a/etc/popupbase.css b/etc/popupbase.css
new file mode 100644
index 0000000..74fc4e5
--- /dev/null
+++ b/etc/popupbase.css
@@ -0,0 +1,3 @@
+.nazeka_main_keb{font-family: IPAGothic,TakaoGothic,Noto Sans CJK JP Regular,Meiryo,sans-serif;font-size:18px;color:#9DF}
+.nazeka_main_reb{font-family: IPAGothic,TakaoGothic,Noto Sans CJK JP Regular,Meiryo,sans-serif;font-size:18px;color:#9DF}
+.nazeka_original{font-style: oblique; float: right; margin-right: 2px; margin-left:2px;}
diff --git a/manifest.json b/manifest.json
index 79732df..b44ab8f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -52,5 +52,12 @@
         "16": "img/enabled16.png",
         "32": "img/enabled32.png",
         "512": "img/enabled512.png"
+    },
+
+    "applications": {
+        "gecko": {
+            "id": "nazeka@wareya.moe",
+            "strict_min_version": "45.0"
+        }
     }
 }