diff --git a/platform/chromium/manifest.json b/platform/chromium/manifest.json
index df686a0e77a51..637b26764bcdc 100644
--- a/platform/chromium/manifest.json
+++ b/platform/chromium/manifest.json
@@ -57,8 +57,7 @@
         "https://filterlists.com/*",
         "https://forums.lanik.us/*",
         "https://github.com/*",
-        "https://*.github.io/*",
-        "https://*.letsblock.it/*"
+        "https://*.github.io/*"
       ],
       "js": [
         "/js/scriptlets/subscriber.js"
diff --git a/platform/firefox/manifest.json b/platform/firefox/manifest.json
index db021f2a3650f..aa49d395a9291 100644
--- a/platform/firefox/manifest.json
+++ b/platform/firefox/manifest.json
@@ -71,8 +71,7 @@
         "https://filterlists.com/*",
         "https://forums.lanik.us/*",
         "https://github.com/*",
-        "https://*.github.io/*",
-        "https://*.letsblock.it/*"
+        "https://*.github.io/*"
       ],
       "js": [
         "/js/scriptlets/subscriber.js"
diff --git a/platform/opera/manifest.json b/platform/opera/manifest.json
index afaaad33b7dbd..196c171726670 100644
--- a/platform/opera/manifest.json
+++ b/platform/opera/manifest.json
@@ -57,8 +57,7 @@
         "https://filterlists.com/*",
         "https://forums.lanik.us/*",
         "https://github.com/*",
-        "https://*.github.io/*",
-        "https://*.letsblock.it/*"
+        "https://*.github.io/*"
       ],
       "js": [
         "/js/scriptlets/subscriber.js"
diff --git a/platform/thunderbird/manifest.json b/platform/thunderbird/manifest.json
index 7fd6fad9ae8d8..16206f281a972 100644
--- a/platform/thunderbird/manifest.json
+++ b/platform/thunderbird/manifest.json
@@ -41,8 +41,7 @@
         "https://filterlists.com/*",
         "https://forums.lanik.us/*",
         "https://github.com/*",
-        "https://*.github.io/*",
-        "https://*.letsblock.it/*"
+        "https://*.github.io/*"
       ],
       "js": [
         "/js/scriptlets/subscriber.js"