diff --git a/browser/devtools/projecteditor/lib/stores/local.js b/browser/devtools/projecteditor/lib/stores/local.js
index c91411d9b588..a16b1896092e 100644
--- a/browser/devtools/projecteditor/lib/stores/local.js
+++ b/browser/devtools/projecteditor/lib/stores/local.js
@@ -122,7 +122,7 @@ var LocalStore = Class({
 
       let resource = this._forPath(path, info);
       parent.addChild(resource);
-      throw new Task.Result(resource);
+      return resource;
     }.bind(this));
   },
 
diff --git a/toolkit/devtools/server/actors/stylesheets.js b/toolkit/devtools/server/actors/stylesheets.js
index 3c6595293aba..5fa615cab4d3 100644
--- a/toolkit/devtools/server/actors/stylesheets.js
+++ b/toolkit/devtools/server/actors/stylesheets.js
@@ -116,7 +116,7 @@ let StyleSheetsActor = exports.StyleSheetsActor = protocol.ActorClass({
           }
         }
       }
-      throw new Task.Result(actors);
+      return actors;
     }.bind(this));
   },
 
@@ -142,7 +142,7 @@ let StyleSheetsActor = exports.StyleSheetsActor = protocol.ActorClass({
         let imports = yield this._getImported(actor);
         actors = actors.concat(imports);
       }
-      throw new Task.Result(actors);
+      return actors;
     }.bind(this));
   },
 
@@ -180,7 +180,7 @@ let StyleSheetsActor = exports.StyleSheetsActor = protocol.ActorClass({
         }
       }
 
-      throw new Task.Result(imported);
+      return imported;
     }.bind(this));
   },