I second Vivaldi. It’s a great chromium based alternative to chrome, and the level of customisation on offer is jaw-dropping. Its mouse gestures in particular, have been a huge convenience. The only thing about it that irks me somewhat is that it’s noticeably slower to start compared to Firefox and Edge.
The tight temperature range is something I very much agree with you on. I think climate conducive to their growth play a big factor in disease immunity as well. I’ve seen them thrive like weeds in sub tropical regions. But for some reason, even in controlled conditions, they fail to do that well here in my area.