1. Please remove line 176-181 `extension.js`, 73-81 `prefs.js`. Not needed. 2. Unused import (line 29 `prefs.js`). 3. You have `this.getSettings()` in the entry point. No need to use line 50-59 `settings.js`. 4. No need to use `this.initTranslation()` (line 41 `prefs.js`): > Consider this method deprecated. > Only specify gettext-domain in metadata.json. > GNOME Shell can automatically initiate the translation for you > when it sees the gettext-domain key in metadata.json. [Port Guide 45: Extension Utils](https://gjs.guide/extensions/upgrading/gnome-shell-45.html#extensionutils) 5. Don't store anything in global scope if you don't want to clean up after window close (line 42 `prefs.js`): [EGO Review Guidelines: Initialization](https://gjs.guide/extensions/review-guidelines/review-guidelines.html#only-use-initialization-for-static-resources) 6. `this` is the current extension. no need to use line 58-60 `prefs.js`. 7. Use `console.*` instead of `print()` or `log()`: [Port Guide 45: Logging](https://gjs.guide/extensions/upgrading/gnome-shell-45.html#logging) 8. `lookupByURL()` is a bad practice (line 7 `utils.js`). You can send `this` from the entry point to the class needing it when it's possible (dependency injection). 9. Don't use spawn command for opening the prefs window (line 76 `widgets.js`). You have `this.openPreferences()` in the entry point.