just in case

texthook.js

@@ -1355,7 +1355,10 @@ async function send_lookup(lookup, time)
     if(!settings.kanji_mode)
     {
         currently_looking_up = true;
-        let response = await browser.runtime.sendMessage(
+        let response = undefined;
+        try
+        {
+            response = await browser.runtime.sendMessage(
             {
                 type:"search",
                 text:lookup[0],
@@ -1367,6 +1370,12 @@ async function send_lookup(lookup, time)
                     strict_epwing:settings.strict_epwing
                 }
             });
+        }
+        catch(e)
+        {
+            currently_looking_up = false;
+            return;
+        }
         currently_looking_up = false;
         if(response)
             response = response["response"];