baz Reporter
	Description • 7 years ago

User Agent: Mozilla/5.0 (X11; Linux i686; rv:55.0) Gecko/20100101 Firefox/55.0
Build ID: 20170521100319

Steps to reproduce:

I open the URL http://www.pleinchamp.com/meteo/previsions-departementales/ with FF Nightly 55 (Ubuntu 16.04)
The rendering is not the same as in FF 53, and it is downgraded in FF 55.


Actual results:

Using FF55, the  text "Sélectionner un département" is bigger than in FF53. It is too big with FF55, so this text goes under another field in the page, the rendering is not good.
It seems that the font size is not the good one (but I am not an expert at all).


Expected results:

I would expect the same behaviour with FF55 and FF53.
With FF53, the rendering is better in term on size.

	Loic
	Comment 1 • 7 years ago

http://www.pleinchamp.com/ is using Roboto fonts and I think there are some issues with this font, see https://github.com/google/fonts/issues/738

	baz Reporter
	Comment 3 • 7 years ago

I add an image which is a FF55 vs. FF53 comparaison.

	Loic
	Comment 4 • 7 years ago

You can see the font used is different, selectthe text "Sélectionner un département" then right click and select "inspect element", then select the "font" panel.

In FF53, the font used is "Roboto Condensed Bold remote".
In FF55, the font used is fallback font "Times New Roman Bold system".

	Jonathan Kew [:jfkthame]
	Comment 5 • 7 years ago

This is the usual problem with Google Fonts serving resources with OpenType Layout tables that fail validation, so the fonts are not used by default on developer channels; see bug 1331737. You can work around it by setting the pref introduced there (gfx.downloadable_fonts.otl_validation) to false.