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$S” menu.
Ri taq rujaloj rojqanem okisaxel nrajo' chi nisamajib'ëx chik richin nitz'aqät rokisaxik.  Ri yonil taq samajib'enïk kan echupun pe richin man yesach ta xab'achike jaloj pa DevTools.  Yatikïr natzïj ri samajib'exïk rik'in ri “%1$S” k'utsamaj.