1434222 - ui scaling detection only works in 0.5 steps

Status: UNCONFIRMED

(Core :: Widget: Gtk, defect, P5)

Description

[Manuel Vögele]

Attachment: Font out of proportion to address bar and tab size

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0
Build ID: 20180123154148

Steps to reproduce:

- Use KDE screen scale setting to set scaling to 130%
- Open firefox


Actual results:

The font size of the tabs and address bar increase accordingly. The rest oft the ui (including the website contents) stays at 100%. In the attached screenshot you can see how the sizes of the tabs and address bars and the fonts within them are out of proportion.


Expected results:

The rest of the ui should scale up as well. This works fine when scaling up to 150%.

Scaling to 130% manually using the setting `layout.css.devPixelsPerPx` works, but shouldn't be necessary.

Comment 1

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1552613