Firefox fonts

[Michael Hennebry]

I recently installed some courier fonts.
I cannot tell which, if any, of them Firefox is using.
They are in the font chooser.

How do I discover what font Firefox actually uses for something?
I've found Inspect Element, but I'm pretty sure Firefox is substituting.
How do I discover what was substituted?

Is there a way to control what Firefox uses for substitution?

I'm running CentOS 6.

-- 
Michael   hennebry(a)web.cs.ndsu.NoDak.edu
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods

[Sylvia Sánchez]

You have a setting under Fonts in Gnome preferences, right?
If you change that setting, let's say picking Chancery font instead of
Sans font, what happens?
Do you see that change in Firefox?  Or Firefox is still using its own
fonts settings?

Hope I'm clearer now...

Cheers!
Sylvia

[Michael Hennebry]

On Tue, 7 Oct 2014, Michael Hennebry wrote:

>  In case i wasn't clear before:
>  Firefox is set to let a web page choose its fonts.
>  Sometimes Firefox does not have the requested font.
>  The relationship between the requested font,
>  the available fonts and the font chosen is not trivial.
>  I'm not sure whether I have discovered it.
>  Inspect Element gives me the requested font.
>  I'm trying to find the chosen font. 
Inspect Element does do the trick.
I just needed the font view.
Got that from someone on a mozilla help forum.

-- 
Michael   hennebry(a)web.cs.ndsu.NoDak.edu
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods

[Michael Hennebry]

On Tue, 7 Oct 2014, Sylvia Sánchez wrote:

>  You have a setting under Fonts in Gnome preferences, right?
>  If you change that setting, let's say picking Chancery font instead of
>  Sans font, what happens?
>  Do you see that change in Firefox?  Or Firefox is still using its own
>  fonts settings? 
I see changes in FIrefox's toolbar and such.
No change in the actual web page.
The latter is what I would expect.

In case i wasn't clear before:
Firefox is set to let a web page choose its fonts.
Sometimes Firefox does not have the requested font.
The relationship between the requested font,
the available fonts and the font chosen is not trivial.
I'm not sure whether I have discovered it.
Inspect Element gives me the requested font.
I'm trying to find the chosen font.

-- 
Michael   hennebry(a)web.cs.ndsu.NoDak.edu
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods

[Michael Hennebry]

On Tue, 7 Oct 2014, Sylvia Sánchez wrote:

>  And if you change those fonts in Gnome settings....  what happens? 
> Do
>  you see the changes reflected in Firefox? 
I'm not sure what you are suggesting I do.
I did eventually find /etc/fonts and man fonts-conf ,
but it's not really helping.
I suppose if I read the man page closely enough I might
be able to get the precise alogrithm for font selection.
If I were really good and Firefox really did use the documented algorithm,
I might, with great effort, be able to figure out
which font Firefox had chosen for a particular element.
I'd rather just ask it.
Is there a way?

-- 
Michael   hennebry(a)web.cs.ndsu.NoDak.edu
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods

[Sylvia Sánchez]

And if you change those fonts in Gnome settings....  what happens?  Do
you see the changes reflected in Firefox?

Cheers!
Sylvia

[Michael Hennebry]

On Tue, 7 Oct 2014, Sylvia Sánchez wrote:

>  Usually Firefox uses anything configured in your desktop.
>  You should take a look to the fonts settings part in your desktop settings. 
I can find lists of fonts, both from firefox and from fc-list.
gnome->system->preferences->appearence->fonts gives me sans,
sans bold and monospace, none of which are on either of the previous lists.
Inspect Element on Firefox sometimes gives me fonts which
are not on either list.  Clearly substituion is happening.
I'd like to know what is being substituted.
I'd like to be able to control it.

-- 
Michael   hennebry(a)web.cs.ndsu.NoDak.edu
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods

[Sylvia Sánchez]

Usually Firefox uses anything configured in your desktop.
You should take a look to the fonts settings part in your desktop settings.

Cheers, hope this helps
Sylvia