remove 1406 css font loading api #744, #731

user.js

@@ -797,8 +797,6 @@ user_pref("browser.display.use_document_fonts", 0);
 user_pref("gfx.font_rendering.opentype_svg.enabled", false);
 /* 1405: disable WOFF2 (Web Open Font Format) [FF35+] ***/
    // user_pref("gfx.downloadable_fonts.woff2.enabled", false);
-/* 1406: disable CSS Font Loading API ***/
-   // user_pref("layout.css.font-loading-api.enabled", false);
 /* 1408: disable graphite which FF49 turned back on by default
  * In the past it had security issues. Update: This continues to be the case, see [1]
  * [1] https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778 ***/