'I never, never want to write C++.'
Seriously, I can't say how much I want not to write C or C++. Life is too short to use unsafe languages.
Seriously, though, I want the software I run to obey me, not someone else: not Microsoft, not Apple, not some government on the other side of the world — and not Mozilla. I want to be able to modify its functionality in a straightforward manner, in a reasonably-sane garbage-collected language (so, not C, not C++, not Java and not JavaScript).
I would like to be able to add pull data from sites I visit and plumb it through the rest of my system using something like Plan 9's plumber. I don't want a browser which says, 'sorry, I won't trust you to choose the extensions you like.'
https://en.wikipedia.org/wiki/Chromium_Embedded_Framework
There are bindings for several languages, no need to write C++.