stability fixes

ext/bg.js

@@ -338,7 +338,7 @@ function attach_ws_events(ws){
 					send(ws, seqid, {"status": true, "result": result});
 				}catch(err){
 					
-					send(ws, seqid, {"status": err.name + ": " + err.message});
+					send(ws, seqid, {"status": err.name + ": " + err.message, "result": null});
 				}
 				break;
 			
@@ -551,6 +551,8 @@ async function buff2b64(uint8Array) {
 browser.webRequest.onBeforeRequest.addListener(
 	function(details){
 		
+		if(global_ws === null){ return; }
+		
 		if(!web_response_whitelist.includes(details.type)){
 			
 			return;
@@ -565,7 +567,6 @@ browser.webRequest.onBeforeRequest.addListener(
 		}
 		
 		var resolve_func = null;
-		var reject_func = null;
 		
 		webreq_completed.set(
 			details.requestId,
@@ -636,6 +637,8 @@ browser.webRequest.onBeforeRequest.addListener(
 browser.webRequest.onCompleted.addListener(
 	async function(details){
 		
+		if(global_ws === null){ return; }
+		
 		var pending_req = null;
 		
 		pending_req = await webreq_completed.get(details.requestId);
@@ -679,11 +682,7 @@ browser.webRequest.onCompleted.addListener(
 browser.webRequest.onErrorOccurred.addListener(
 	async function(page){
 		
-		if(connected === false){
-			
-			// disconnect ws handler should clean old payloads
-			return;
-		}
+		if(global_ws === null){ return; }
 		
 		var pending_req = webreq_completed.get(page.requestId);
 
@@ -734,7 +733,7 @@ browser.proxy.onRequest.addListener(function(request){
 
 browser.tabs.onUpdated.addListener(function(tabid, event, tab){
 	
-	if(connected === false){ return; }
+	if(global_ws === null){ return; }
 	
 	if(event.status === "complete"){
 		
@@ -756,9 +755,12 @@ browser.tabs.onUpdated.addListener(function(tabid, event, tab){
 	}
 });
 
-browser.webRequest.onHeadersReceived.addListener(function(page){
+browser.webRequest.onHeadersReceived.addListener(
+	function(page){
 		
-		if(page.type != "main_frame"){
+		if(global_ws === null){ return; }
+		
+		if(!web_response_whitelist.includes(page.type)){
 			
 			return
 		};