Update manifest.json

Author: rgantzos

manifest.json

@@ -8,7 +8,7 @@
     "background": {
         "service_worker": "/extras/background.js"
     },
-    "browser": {
+    "action": {
         "default_icon": "icon128.png",
         "default_popup": "/extras/popup.html",
         "default_title": "ScratchTools"
@@ -29,6 +29,7 @@
             "matches": ["https://scratch.mit.edu/*"],
             "all_frames": true,
             "js": ["/pages/all.js", "/pages/discuss.js", "/pages/editor.js", "/pages/home.js", "/pages/join.js", "/pages/profile.js", "/pages/project.js", "/features/advanced-search.js", "/features/color-slider-input.js", "/features/more-tutorials.js", "/features/nfe-search.js", "/features/open-in-new-tab.js", "/features/plain-background.js", "/features/statistics.js", "/features/turbowarp-button.js"],
+            "css": [],
             "run_at": "document_end"
         }
     ]