Currently you are unable to mass transfer tabs from (A different device) to (Your device) in any way, no multiselect, no open all, nothing. Please implement a way to open all synced tabs on a new device
That would be great. I'm still struggling to move over 590 tabs (mostly novels) from my old phone to my new phone. There's no way to do it except by manually bookmarking each tab. There's also no option to select all the tabs at once, so I have to bookmark them one by one.