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In Nightly, font rendering is messed up on a few sites. (bad AA)




Graphics: Text
2 months ago
2 hours ago


(Reporter: danPixl, Unassigned)


57 Branch

Firefox Tracking Flags

(firefox57 affected)


(Whiteboard: gfx-noted)


(4 attachments)



2 months ago
Created attachment 8894665 [details]
Screenshot from 2017-08-07 16-54-32.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20170807113452

Steps to reproduce:

1. Go to a website in Nightly, the two that I've tested and confirmed are The Verge (https://theverge.com) and Google Inbox (https://inbox.google.com)

2. Look at the body text on the page.

I use infinality & Debian 9 if that matters. The issue doesn't occur on Chrome.

Actual results:

Blocky, old-looking fonts. 

Expected results:

Smooth font rendering.


2 months ago
Component: Untriaged → Graphics: Text
OS: Unspecified → Linux
Product: Firefox → Core
Hardware: Unspecified → x86_64
I can't reproduce it on Ubuntu 16.04. Jonathan, do you have any idea about it?
Flags: needinfo?(jfkthame)
It looks like antialiasing (font smoothing) is turned off, which is generally controlled via system-level preferences or fontconfig settings -- exactly where to find them depends on the desktop environment being used, I guess. I believe Firefox pays more attention to these settings than Chrome, which might explain why things look different there (I wouldn't be surprised if Chrome applies smoothing regardless of OS-level settings).

(Also possibly relevant: what specific font is being used, as determined by the Fonts panel in the devtools Element Inspector?)
Flags: needinfo?(jfkthame)
Priority: -- → P3
Whiteboard: gfx-noted

Comment 3

16 days ago
Created attachment 8905175 [details]

Same problem. RGB anti-aliasing and hinting don't work on some sites.
System settings: anti-aliasing: enabled, subpixel rendering type: RGB, hinting style: slight.
System: Kubuntu 16.04.3, 64-bit. Nightly 57.0a1 (2017-09-06).

Comment 4

9 days ago
Created attachment 8907959 [details]
Screenshot from 2017-09-14 06-17-45.png

Another example. Ubuntu 16.04.3 LTS.
Any chance of running mozregression [1] on this?  Sounds like a recent problem.

[1] http://mozilla.github.io/mozregression/quickstart.html
status-firefox57: --- → affected
Flags: needinfo?(s.khoruzhin)
Priority: P3 → P2
Summary: In Nightly, font rendering is messed up on a few sites. → In Nightly, font rendering is messed up on a few sites. (bad AA)

Comment 6

5 days ago
Created attachment 8909142 [details]

I can't reproduce this problem using mozregression. But I did some tests. Results are in the picture. System settings of anti-aliasing are work for GUI in all versions of Firefox, but not for sites rendering.
Flags: needinfo?(s.khoruzhin)
This reproduces with a clean profile?
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