Safari 6 change font

[arashb]

Is there any way to force Safari to use Helvetica on all websites? Extensions only work on some websites. I remember older versions use to let you change the font but not in 6. Is there a workaround?

 

[Watabou]

There's a Safari extension called HelveticaTheWorld. Changes every font on every website to Helvetica.

 

[japtor]

You might be able to pull it off with your own stylesheet, if Safari 6 still gives you the option of having your own.

This thread has a way of doing it:
https://discussions.apple.com/thread/1215251?start=0&tstart=0
Basically put this in a plain text file and call it anything.css, then select it in Safari.

/* From Apple Discussion Board Suggestions */
\* {
font-family: Helvetica !important;
}

body, p, b, i, u, h1, h1*, h2, h2*, h3, h3*, h4, h4*, h5, h5*, h6, h6* \[class\], \[span\], \[id\], \[style\] {
font-family: Helvetica !important;
}

/* My custom defs */
dl, dt, dd, ol, ul, li, td, input, * {
font-family: Helvetica !important;
}

There's also this extension to apply a custom stylesheet, but I don't know if it can act globally (I just use it to tweak stuff per domain):
http://code.grid.in.th/

...or the extension mentioned in the post above. Looks like it's on Apple's extensions gallery under the Other category.