Comment 33 for bug 1500282

(In reply to Kai Mast from comment #0)
> Steps to reproduce:
>
> Set the scaling vlaue in unity-control-center to a float value, e.g. 1.5.
>
>
> Actual results:
>
> Firefox adapts its highdpi settings to the value in unity-control-center.
>
> However, it will round the scale to the next higher value, e.g. 2.0.
> This means everything is much bigger than it should be.

Thanks. That is a bug. The intention was that 1.5 would be rounded down to
1. Text is still scaled and UI auto-expands where necessary to accommodate
the text, but icons are still rendered at system sizes.

I also think that an additional step of 1.5 and rounding down for smaller
values (at least) would be a sensible compromise.
https://bugzilla.mozilla.org/show_bug.cgi?id=1081142#c10