"Soft reload" approach to fix file: and ftp: issues.

src/lib/SyncMessage.js

@@ -216,11 +216,6 @@
 
       if (MOZILLA) {
 
-        // In order to cope with inconsistencies in XHR synchronicity,
-        // allowing scripts to be executed (especially with synchronous loads
-        // or when other extensions manipulate the DOM early) we additionally
-        // suspend on beforescriptexecute events
-
         let startTime = Date.now(); // DEV_ONLY
         let suspendURL = url + "&suspend=true";
         let suspended = 0;
@@ -240,22 +235,8 @@
           console.debug("sendSyncMessage resume #%s/%s - %sms", id, suspended, Date.now() - startTime); // DEV_ONLY
         };
 
-        let domSuspender = new MutationObserver(records => {
-          console.debug("sendSyncMessage suspending on ", records)
-          suspend();
-        });
-        domSuspender.observe(document, {childList: true, subtree: true});
-
-        let bodySuspender = e => {
-          console.debug("Suspending on DOMContentLoaded");
-          suspend();
-        };
-
-        addEventListener("DOMContentLoaded", bodySuspender, true);
         let finalize = () => {
           console.debug("sendSyncMessage finalizing");
-          domSuspender.disconnect();
-          removeEventListener("DOMContentLoaded", bodySuspender, true);
         };
 
         // on Firefox we first need to send an async message telling the

src/manifest.json

@@ -77,7 +77,6 @@
       "run_at": "document_start",
       "matches": ["file://*/*", "ftp://*/*"],
       "js": [
-        "lib/SyncMessage.js",
         "content/syncFetchPolicy.js"
       ]
     },
@@ -89,6 +88,7 @@
       "js": [
         "lib/UA.js",
         "lib/browser-polyfill.js",
+        "lib/SyncMessage.js",
         "lib/log.js",
         "lib/uuid.js",
         "lib/sha256.js",
@@ -106,6 +106,7 @@
         "content/sanitizePaste.js"
       ]
     },
+
     {
       "run_at": "document_start",
       "matches": ["ftp://*/*"],