diff --git a/platform/mv3/extension/js/scripting-manager.js b/platform/mv3/extension/js/scripting-manager.js
index 810d0cae0..4b0b0d592 100644
--- a/platform/mv3/extension/js/scripting-manager.js
+++ b/platform/mv3/extension/js/scripting-manager.js
@@ -612,22 +612,24 @@ async function registerInjectables() {
 
     if ( toRemove.length !== 0 ) {
         ubolLog(`Unregistered ${toRemove} content (css/js)`);
-        await browser.scripting.unregisterContentScripts({ ids: toRemove }).then(( ) => {
+        try {
+            await browser.scripting.unregisterContentScripts({ ids: toRemove });
             localRemove('$scripting.unregisterContentScripts');
-        }).catch(reason => {
+        } catch(reason) {
             localWrite('$scripting.unregisterContentScripts', reason);
             console.info(reason);
-        });
+        }
     }
 
     if ( toAdd.length !== 0 ) {
         ubolLog(`Registered ${toAdd.map(v => v.id)} content (css/js)`);
-        await browser.scripting.registerContentScripts(toAdd).then(( ) => {
+        try {
+            await browser.scripting.registerContentScripts(toAdd);
             localRemove('$scripting.registerContentScripts');
-        }).catch(reason => {
+        } catch(reason) {
             localWrite('$scripting.registerContentScripts', reason);
             console.info(reason);
-        });
+        }
     }
 
     registerInjectables.barrier = false;