Edge already has Cortana-specific browser chrome. (Some restaurant pages, for example, will light up Cortana&#x27;s halo in the address bar and clicking that will open a Cortana sidebar full of action cards like &quot;Create a Reservation&quot;.) It&#x27;s not surprising that the plans are to continue adding Cortana functionality in Edge, and to work to make that hand-off between &quot;Taskbar Cortana&quot; and &quot;Edge Cortana&quot; as seamless as possible.<p>Theoretically they could probably leverage extensions to other browsers, but making sure users had those extensions installed and handing off to those extensions would presumably be A) a bunch of additional work for the teams involved, and B) threaten to show a bunch of seams between the application boundaries, hurting the suspension of disbelief that Cortana is an &quot;individual&quot; working in our favor, potentially weakening Cortana in the public&#x27;s eyes.