Yes they can! Please click here for a guide on how to add the active URL(s) you would like your Hijack to display on.
Once you have added the URL(s), simply append the following text onto the end of any where you would like your Hijack to automatically open.
?overlay=true
Now, when a user visits the URL, the Hijack will pop open for them automatically without them needing to click on the icon in the bottom right-hand corner.
This is perfect for situations such as email campaigns and social media and enables you to drop your audience right into a Hijack, no faff necessary.