* Get a site instance related to current one instead of creation a new one
Using `GetRelatedSiteInstance` will keep the relation (same browsing instance) between the current and the new site instance.
* Some relies on preloads in opened window
The fact that, now, we always have an opener for opened windows diables note integration in opened windows, except if `nodeIntegrationInSubFrames` is enabled.
* Add a test on window.opener after cross-orgin navigation
* Make sure to unregisterProtocol in tests
* Introduc and use a NetworkSandbox for tests
* Modify tests about zoom persistence to properly simulate cross-origin navigation
* Revert "Modify tests about zoom persistence to properly simulate cross-origin navigation"
This reverts commit 0a7537f2eb7f183ddec16637e8a2e92a0d600321.
