Followup: modularity, WebExtensions, and going faster

[Martin Thomson]

On Fri, Oct 7, 2016 at 2:40 AM, Gijs Kruitbosch
<gijskruitbosch at gmail.com> wrote:
> It feels like at least some of the components you're referring to could not
> realistically be (a / separate) webextension(s) as a result of their needing
> to be "in sync".

Isn't it still true that a synchronous component can depend on an
asynchronous one provided that they don't run on the same thread?  As
in, if window.alert() needs to trigger activity on the browser
process, only the content process (thread) needs to block.