Ember Inspector displays > Ember application not detected! > >Here are some common reasons this happens: > > - This is not an Ember application. > - You are using an old version of Ember (< rc5). with Firefox 120.0. **To Reproduce** Steps to reproduce the behavior: 1. Create a new Ember project by running `ember new super-rentals --lang en` 2. Start the developer server by running `cd super-rentals/ && ember server` 3. Open http://localhost:4200/ using Firefox 4. Open Ember Inspector **Expected behavior** Ember Inspector working. **Environment** `ember-cli`: 5.4.1 `node` : 20.5.1 `os`: linux x64 Firefox: 120.0 **Additional context** Ember Inspector works as expected in Chrome.