For real, though, what is it?

Since it needs to be compiled to JavaScript in order to be used, I kind of consider it a different language. Yes, it’s a strict superset of JavaScript, but that makes it different.

It’s much better to make your own function that uses bitwise operations to do addition.

function add(a, b) {
    while (b !== 0) {
        // Calculate carry
        let carry = a & b;

        // Sum without carry
        a = a ^ b;

        // Shift carry to the left
        b = carry << 1;
    }
    return a;
}

(For certain definitions of better.)

I feel like that’s all you need. You don’t have their apps installed, so the problem is already solved. If you use uBlock Origin to block their trackers, the problem is solved. So you’ve solved it twice.