Device simulation changes require a reload to fully apply.  Automatic reloads are disabled by default to avoid losing any changes in DevTools.  You can enable reloading via the “%1$S” menu.
Asnifel n userwes n ibenk isra ales n tulya akken ad iddu akken iwata.  tulya tawurmant tensa deg iγewwaṛen imezwar akken ad ḥerzen asnifel n DevTools.  Tzemreḍ ad tremdeḍ tulya s ttawil n umuγ “%1$S”.