diff --git a/extensions/chromium/runet-censorship-bypass/src/extension-common/37-sync-pac-script-with-pac-provider-api.tmpl.js b/extensions/chromium/runet-censorship-bypass/src/extension-common/37-sync-pac-script-with-pac-provider-api.tmpl.js
index 9c07766..81edbc5 100644
--- a/extensions/chromium/runet-censorship-bypass/src/extension-common/37-sync-pac-script-with-pac-provider-api.tmpl.js
+++ b/extensions/chromium/runet-censorship-bypass/src/extension-common/37-sync-pac-script-with-pac-provider-api.tmpl.js
@@ -242,6 +242,12 @@
 
     },
 
+    clearLastModified() {
+
+      this.setLastModified(0);
+
+    },
+
     mustBeKey(key = mandatory()) {
 
       if ( !(key === null || this.pacProviders[key]) ) {
@@ -519,6 +525,10 @@
         // LAUNCH, RELOAD, ENABLE
         antiCensorRu.pacProviders = oldStorage.pacProviders;
         console.log('Extension launched, reloaded or enabled.');
+        if (window.apis.platform.ifFirefox) {
+          antiCensorRu.clearLastModified();
+          await new Promise((r) => antiCensorRu.syncWithPacProviderAsync(r)); // On each launch, ffx has no memory.
+        }
         return resolve();
 
       }