diff --git a/qutebrowser/browser/greasemonkey.py b/qutebrowser/browser/greasemonkey.py
index db8246bab..cff45f3ac 100644
--- a/qutebrowser/browser/greasemonkey.py
+++ b/qutebrowser/browser/greasemonkey.py
@@ -58,6 +58,7 @@ class GreasemonkeyScript:
         self.run_at = None
         self.script_meta = None
         self.runs_on_sub_frames = True
+        self.jsworld = "main"
         for name, value in properties:
             if name == 'name':
                 self.name = value
@@ -77,6 +78,8 @@ class GreasemonkeyScript:
                 self.runs_on_sub_frames = False
             elif name == 'require':
                 self.requires.append(value)
+            elif name == 'qute-js-world':
+                self.jsworld = value
 
     HEADER_REGEX = r'// ==UserScript==|\n+// ==/UserScript==\n'
     PROPS_REGEX = r'// @(?P<prop>[^\s]+)\s*(?P<val>.*)'
diff --git a/qutebrowser/browser/webengine/webenginetab.py b/qutebrowser/browser/webengine/webenginetab.py
index 185021bfa..501735fa5 100644
--- a/qutebrowser/browser/webengine/webenginetab.py
+++ b/qutebrowser/browser/webengine/webenginetab.py
@@ -900,7 +900,18 @@ class _WebEngineScripts(QObject):
             # @run-at (and @include/@exclude/@match) is parsed by
             # QWebEngineScript.
             new_script = QWebEngineScript()
-            new_script.setWorldId(QWebEngineScript.MainWorld)
+            try:
+                world = int(script.jsworld)
+            except ValueError:
+                try:
+                    world = _JS_WORLD_MAP[usertypes.JsWorld[
+                        script.jsworld.lower()]]
+                except KeyError:
+                    log.greasemonkey.error(
+                        "script {} has invalid value for '@qute-js-world'"
+                        ": {}".format(script.name, script.jsworld))
+                    continue
+            new_script.setWorldId(world)
             new_script.setSourceCode(script.code())
             new_script.setName("GM-{}".format(script.name))
             new_script.setRunsOnSubFrames(script.runs_on_sub_frames)