Fix inoperative try/catch

[CGNonofr]

There is a try/catch preventing errors if invoked from a nested browsing context but at least in lastest chrome, the method returns a rejected promise in that case and the try/catch does nothing leading to an uncaught error

[ulugbekna]

nice catch, thank you! ❤️

[roblourens]

If you're gonna await it, I would rather see the .then removed, I find it confusing to mix and match

[ulugbekna]

I agree with the comment above, but let's address it in another PR