i am using "
ionic serve --lab
" but it open in browser mode but not ionic lab
ionic info output
--lab option was deprecated and then removed in Ionic CLI 7.0.0
why ? it is like google deprecate its google chrome browser and its searchbar
because of google assistant 
then any other option for doing that, because in browser window (ctrl+shift+m) it is not same as lab view ? @ julio-ionic
Lab was deprecated as its original purpose was fulfilled in browser devtools. Both chrome and safari provide a rich experience for emulating ios and android devices and letting developers see what their app will look like when deployed to a real device