1403: icon fonts: flip it and add a related pref

[Thorin-Oakenpants]

snip

[Atavic]

font-face is usually 3rd party, right?

According to the HTTP Archive, 67% of web pages now use custom fonts.
See: https://wp-rocket.me/blog/guide-web-font-optimization/

[earthlng]

Note on why it was at active true: I assume it's because too much broke for end users when false

I think we enforced true because false also breaks fonts/icons in extensions

[earthlng]

Maybe he's using a woff font in the extension that might be blocked by another pref, IDK.

[Maryse47]

I know Linux users can have issues when limiting (1401) browser.display.use_document_fonts=0 (and need to change the default serif font or something). And I had issues in extensions with "ligatures" (in Header Editor which gorhill helped me with and the HE guy had a workaround)

@Thorin-Oakenpants It seems fonts are broken again with HE 4.0.0 release 😞

[crssi]

^^Really? Where? I can't see anything (or I am blind) at https://github.com/FirefoxBar/HeaderEditor/issues

[Maryse47]

FirefoxBar/HeaderEditor#46 (comment)