From a489c192d6ab3bc70cf6af90f4a60c04a2a76a9d Mon Sep 17 00:00:00 2001
From: hackademix
Date: Mon, 8 Apr 2019 13:08:17 +0200
Subject: Make RequestGuard's header processing synchronous on non-supporting
 browsers.

---
 src/bg/ChildPolicies.js |  9 +++++----
 src/bg/RequestGuard.js  | 14 ++++++++++----
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/src/bg/ChildPolicies.js b/src/bg/ChildPolicies.js
index e5024e7..58b18ca 100644
--- a/src/bg/ChildPolicies.js
+++ b/src/bg/ChildPolicies.js
@@ -51,10 +51,6 @@
     }
   };
 
-  if (!browser.contentScripts) { // #chromium fallback
-    Scripts.register = () => {};
-  }
-
   let flatten = arr => arr.reduce((a, b) => a.concat(Array.isArray(b) ? flatten(b) : b), []);
 
   let protocolRx = /^(\w+):/i;
@@ -196,4 +192,9 @@
     },
 
   };
+
+  if (!browser.contentScripts) { // #chromium fallback
+    Scripts.register = ChildPolicies.update = () => {};
+  }
+
 }
diff --git a/src/bg/RequestGuard.js b/src/bg/RequestGuard.js
index c1771aa..bdf2ea2 100644
--- a/src/bg/RequestGuard.js
+++ b/src/bg/RequestGuard.js
@@ -296,7 +296,9 @@ var RequestGuard = (() => {
       }
       return ALLOW;
     },
-    async onHeadersReceived(request) {
+    onHeadersReceived(request) {
+      let result = ALLOW;
+      let promises = [];
       // called for main_frame, sub_frame and object
       // check for duplicate calls
       let headersModified = false;
@@ -324,7 +326,7 @@ var RequestGuard = (() => {
           if (isMainFrame) {
             if (policy.autoAllowTop && perms === policy.DEFAULT) {
               policy.set(Sites.optimalKey(url), perms = policy.TRUSTED.tempTwin);
-              await ChildPolicies.update(policy);
+              promises.push(ChildPolicies.update(policy));
             }
             capabilities = perms.capabilities;
           } else {
@@ -360,12 +362,16 @@ var RequestGuard = (() => {
           headersModified = true;
         }
         if (headersModified) {
-          return {responseHeaders};
+          result = {responseHeaders};
         }
       } catch (e) {
         error(e, "Error in onHeadersReceived", request);
       }
-      return ALLOW;
+      promises = promises.filter(p => p instanceof Promise);
+      if (promises.length > 0) {
+        return Promise.all(promises).then(() => result);
+      }
+      return result;
     },
     onResponseStarted(request) {
       debug("onResponseStarted", request);
-- 
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