That happens if Biden slips and falls in the bath tube, too. Its not an argument for keeping him at the top of the ticket.
No that is not what happens. I'm not arguing to keep him at the top of the ticket. Exactly the opposite: I'm arguing to drop him from the not yet official ticket, but for him to stay on as president until his term ends. That keeps Johnson still only second-in-line for the presidency, with Harris still first-in-line.
If Biden (referring to his governmental role as the current President) dies, Vice President Kamala Harris immediately becomes President.
Whereas referring to his nongovernmental role once (IF) he becomes the official nominee of the Democratic Party, nobody is automatically elevated to be the new nominee of the party. If it's before the election, the executive board of the DNC determines the new nominee. Harris would very likely become the official nominee, but that's not their only choice.
But Biden is not yet the official nominee no matter how many times he and his supporters say he is. He is only the presumptive nominee. So if he died, was incapacitated, or dropped out as a candidate for the nomination now, before the convention roll call, it becomes essentially an open convention and the nominee is chosen the way it used to be, by the convention. Which might take multiple roll calls, behind the scenes favors trading, and all sorts of "fun" drama.
In none of those cases is Speaker of the House Johnson elevated to anything.
Others have explained why Chinese ownership of Opera might be bad.
I suggest you try the Vivaldi browser which is made by a company started by the co-founder & CEO of the original Opera. Basically builds upon the heritage and philosophy of the original Opera. Extremely customizable, tracker and ad blocking built in along with speed dials, gestures, UI customization of just about everything.
Has desktop for all platforms including Linux, and mobile for Android and iOS with sync (not going through Google) for all platforms.
Optional email, calendar, Mastodon and RSS clients in the desktop versions. Optional email account and Mastodon account accessible from any standard client and the Web, or via their desktop.
Not fully open source (nor is Opera) and built on the same open source Chromium base as Opera, Brave, Chrome, but seriously de-Googleized and does not use the Chromium UI. Will continue to support ad blocking even after Google/Chromium removal of the interfaces for ad blocking extensions. Yet desktop versions do allow installation of extensions from the Chrome/Chromium extension store.
Edit: fix link and some grammar