Wrath Cookie Switch for Auto Golden Cookie Clicker
How could I do this a little better?

Initially my eyes are directed at the two branches of the conditional and ways to eliminate the redundancy. Would it be too long of a line to move that conditional check of wrathCookieSwitchOn inside the if inside the forEach?
Game.shimmers.forEach(function(shimmer) {
    if (shimmer.type == &quot;golden&quot; &amp;&amp; (wrathCookieSwitchOn || shimmer.wrath == 0) { 
        shimmer.pop() 
    }
})

It must be asked whether the type of shimmer.wrath needs to be an integer. If any falsely value will suffice, then shimmer.wrath == 0 could be simplified to !shimmer.wrath, otherwise, use strict equality: shimmer.wrath === 0
Beyond that, the only idea I have possibly removing the closure by some technique like currying or just defining a function... or if ES-2015 is an option, simplify it into an arrow function.
Update
In response to your answer, I shall reveal another option I considered, which some argue might be less readable, but yes, like you typed: “if we are going to one-line it, let's one-line it!”:
Game.shimmers.forEach(function(shimmer) {
    shimmer.type == &quot;golden&quot; &amp;&amp; (wrathCookieSwitchOn || shimmer.wrath == 0) &amp;&amp; shimmer.pop();
});

Which would lend itself well to an arrow function (if permissible).