Generally enjoying this.
Since Opera changed I seriously have been looking for a new browser. I used Maxthon for a while... then tried Opera once they brought back bookmarks (seriously, getting rid of bookmarks?) First impressions of Vivaldi are amazing, even if I am probably the exact target audience. So far it's been extremely stable for something described as a [i]technical preview[/i].
Hi & Welcome. If you are "only" using the TP & are already enjoying it [yay], then you might wish to consider downloading & installing the latest Snapshot [currently 1.0.291.18, but that [i]might change again this week]. If you don't know, you can fetch it from here: https://vivaldi.net/en-US/teamblog/56-snapshot-1-0-291-18-a-focus-on-bugfixing .
My original concern with the snapshots is that they wouldn't be as stable… but it seems to be fine!