I wish there was a browser as secure as Chrome but hackable without restrictions. I do not think this is a contradiction, at least not from a technical perspective. I am willing to take the responsibility for all actions and modifications I do to my own browser but I need it be secure against all influences out of my control. And I need it come with secure defaults. To be competitive it needs to come without awkward…
https://firefox.com
Also, even if Firefox retains some of its hackability it can be gone tomorrow. I say this with a heavy heart, I personally lost trust in Mozilla as reasonable stewards of Firefox and allies that would protect Firefox users' freedoms. I don't want to drive this thread into that direction, if you're interested there should be enough in my comment history to give you an idea about the reasons and why I think like that.