Why reinvent the wheel and force yourself to go through a new browser when you have Vivaldi? Extension support is being planned (not sure when it will release). Windows is "coming soon". Linux- I don't think they will support it.

Vivaldi fits the use cases completely - you can keep it as simple or complex as you want. I don't want a browser which is "fast". I want one which works and supports specific general and niche use cases rolled into one.