On Wed, Jan 6, 2021 at 1:23 PM Mike Hommey <m...@glandium.org> wrote:

> On Wed, Jan 06, 2021 at 11:57:18AM -0800, Doug Thayer wrote:
> > If you don't spend any time on Nightly in Windows 10, please feel free to
> > disregard this.
> >
> > tl;dr: we're sometimes creating the first window differently than usual,
> so
> > be on the lookout for breakages.
> >
> > On 2021-01-05, a change landed in Nightly which enabled the pre-XUL
> skeleton
> > UI [1]. This is a feature which allows us to create the first window and
> > populate it with a non-interactive placeholder UI before we load
> xul.dll. On
> > some systems, this can mean we can give visual indication of Firefox
> > launching as much as 15 seconds sooner than normal (loading xul.dll can
> take
> > a while). We're hoping this could be a big win for users who experience
> very
> > slow startups, and we also hope it will improve the overall snappiness of
> > startup even on fast systems.
>
> What does the placeholder UI look like?
>

Colors and layout can vary, but the basic look is this:
[image: image.png]
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