diff --git a/uriloader/exthandler/HandlerList.sys.mjs b/uriloader/exthandler/HandlerList.sys.mjs
index e95d627c07..81f9218da9 100644
--- a/uriloader/exthandler/HandlerList.sys.mjs
+++ b/uriloader/exthandler/HandlerList.sys.mjs
@@ -7,197 +7,25 @@ export const kHandlerListVersion = 1;
 export const kHandlerList = {
   default: {
     schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-        ],
-      },
-    },
-  },
-  cs: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Seznam",
-            uriTemplate: "https://email.seznam.cz/newMessageScreen?mailto=%s",
-          },
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-        ],
-      },
-    },
-  },
-  "es-CL": {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-          {
-            name: "Outlook",
-            uriTemplate:
-              "https://outlook.live.com/default.aspx?rru=compose&to=%s",
-          },
-        ],
-      },
-    },
-  },
-  "ja-JP-mac": {
-    schemes: {
-      mailto: {
+      irc: {
         handlers: [
           {
-            name: "Yahoo!メール",
-            uriTemplate: "https://mail.yahoo.co.jp/compose/?To=%s",
-          },
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
+            name: "KiwiIRC",
+            uriTemplate: "https://web.libera.chat/?url=%s",
           },
         ],
       },
-    },
-  },
-  ja: {
-    schemes: {
-      mailto: {
+      ircs: {
         handlers: [
           {
-            name: "Yahoo!メール",
-            uriTemplate: "https://mail.yahoo.co.jp/compose/?To=%s",
-          },
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
+            name: "KiwiIRC",
+            uriTemplate: "https://web.libera.chat/?url=%s",
           },
         ],
       },
-    },
-  },
-  kk: {
-    schemes: {
       mailto: {
         handlers: [
           {
-            name: "Яндекс.Почта",
-            uriTemplate: "https://mail.yandex.ru/compose?mailto=%s",
-          },
-          {
-            name: "Mail.Ru",
-            uriTemplate: "https://e.mail.ru/cgi-bin/sentmsg?mailto=%s",
-          },
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-        ],
-      },
-    },
-  },
-  ltg: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-          {
-            name: "inbox.lv mail",
-            uriTemplate: "https://mail.inbox.lv/compose?to=%s",
-          },
-        ],
-      },
-    },
-  },
-  lv: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-          {
-            name: "inbox.lv mail",
-            uriTemplate: "https://mail.inbox.lv/compose?to=%s",
-          },
-        ],
-      },
-    },
-  },
-  pl: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Poczta Interia.pl",
-            uriTemplate: "https://poczta.interia.pl/mh/?mailto=%s",
-          },
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-        ],
-      },
-    },
-  },
-  ru: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Яндекс.Почту",
-            uriTemplate: "https://mail.yandex.ru/compose?mailto=%s",
-          },
-          {
-            name: "Mail.Ru",
-            uriTemplate: "https://e.mail.ru/cgi-bin/sentmsg?mailto=%s",
-          },
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-        ],
-      },
-    },
-  },
-  uk: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-          {
-            name: "Outlook",
-            uriTemplate:
-              "https://outlook.live.com/default.aspx?rru=compose&to=%s",
-          },
-        ],
-      },
-    },
-  },
-  uz: {
-    schemes: {
-      mailto: {
-        handlers: [
-          {
-            name: "Gmail",
-            uriTemplate: "https://mail.google.com/mail/?extsrc=mailto&url=%s",
-          },
-          {
-            name: "Mail.Ru",
-            uriTemplate: "https://e.mail.ru/cgi-bin/sentmsg?mailto=%s",
           },
         ],
       },