diff --git a/platform/firefox/frameModule.js b/platform/firefox/frameModule.js
index ac2b4ed07..65de7a9e4 100644
--- a/platform/firefox/frameModule.js
+++ b/platform/firefox/frameModule.js
@@ -205,6 +205,8 @@ const contentObserver = {
             url: location.spec
         };
 
+        //console.log('shouldLoad: type=' + type' ' + 'url=' + location.spec);
+
         if ( typeof messageManager.sendRpcMessage === 'function' ) {
             // https://bugzil.la/1092216
             messageManager.sendRpcMessage(this.cpMessageName, details);
diff --git a/platform/firefox/vapi-background.js b/platform/firefox/vapi-background.js
index deb789038..6790d9886 100644
--- a/platform/firefox/vapi-background.js
+++ b/platform/firefox/vapi-background.js
@@ -1752,10 +1752,10 @@ var httpObserver = {
         //console.log('http-on-opening-request:', URI.spec);
 
         var pendingRequest = this.lookupPendingRequest(URI.spec);
+        var rawtype = channel.loadInfo && channel.loadInfo.contentPolicyType || 1;
 
         // Behind-the-scene request
         if ( pendingRequest === null ) {
-            var rawtype = channel.loadInfo && channel.loadInfo.contentPolicyType || 1;
             if ( this.handleRequest(channel, URI, { tabId: vAPI.noTabId, rawtype: rawtype }) ) {
                 return;
             }
@@ -1768,6 +1768,13 @@ var httpObserver = {
             return;
         }
 
+        // https://github.com/gorhill/uBlock/issues/654
+        // Use the request type from the HTTP observer point of view, it's most
+        // likely the most accurate.
+        if ( rawtype !== 1 ) {
+            pendingRequest.rawtype = rawtype;
+        }
+
         if ( this.handleRequest(channel, URI, pendingRequest) ) {
             return;
         }