Created attachment 584714 [details]
When opened, the Style sidebar has a blueish background for a second before loading the content. This happens every time the sidebar is shown.
Created attachment 584715 [details]
Is it like a transparent background? Do we see the window that is behind the Firefox window?
(In reply to Paul Rouget [:paul] from comment #2)
> Is it like a transparent background? Do we see the window that is behind the
> Firefox window?
No, it's opaque.
I can take a look at this tomorrow.
I can reproduce this and the background is transparent (the same as the title bar). The problem is that if we put e.g. a white background behind the tools before they are initialized then it either causes more flicker. Maybe we could use a white background for each tool until it is fully initialized.
Created attachment 586957 [details] [diff] [review]
Comment on attachment 586957 [details] [diff] [review]
Looks good! Thanks for the fix!