Red Hat Bugzilla – Bug 137500
Fuzzy FireFox fonts
Last modified: 2007-11-30 17:10:53 EST
Running firefox, I noticed that google was to my eye noticeably
fuzzier than with Mozilla.
The two attachments show mozilla and firefox rendering the same
page with the same font options (This was directly after profile
migration from Mozilla => FireFox)
Note with xmag that the pixels are not the same, which I would
My *guess* here is that the FireFox gecko is asking for the
fonts at a non-integral size, causing fuzziness. Another possibility
is that it is just asking for the font at a different size that
doesn't render as well. But note the double-sided fuzz on the
left stroke of the 'R' - that shouldn't happen with our default
font hinting algorithms.
Created attachment 105918 [details]
Created attachment 105919 [details]
Any different with PANGO enabled?
This is whatever is the default for the FC3 RPMS. I don't know
if Pango is enabled in both, neither, or one and not the other.
Check your versions, because pango was enabled by default for a short
while, then disabled by default. The latest are disabled by default,
but you can enable with MOZ_ENABLE_PANGO=1. We plan on doing FC
updates real soon of both firefox and thunderbird that enables pango
by default while fixing several other bugs.
$ rpm -q firefox mozilla
The same difference and same fuzzy fonts in firefox persist when
I run firefox with MOZ_ENABLE_PANGO=1.
There shouldn't be any difference between the two. Are you sure that
you're default font size in Firefox isn't some random zoomed size?
(ctrl-0 will restore it to the default.)
If you look closely at the 'G' in AGP you'll see that they are
actually picking up different fonts ... Luxi Sans for Mozilla
and some Helvetica clone (Nimbus Sans, Arial, whatever) for
Since I have my XP partition's fonts in my font path and the page
specifies 'font-family:arial,sans-serif' it looks like Firefox
is behaving correctly, and Mozilla incorrectly.