https://lists.freebsd.org/pipermail/freebsd-gecko/2019-March/009206.html
https://github.com/grahamperrin/Waterfox/pull/7/files


diff -urN firefox-60.6.0_orig/servo/components/style/lib.rs firefox-60.6.0/servo/components/style/lib.rs
--- firefox-60.6.0_orig/servo/components/style/lib.rs	2019-03-13 21:33:48.000000000 +0000
+++ firefox-60.6.0/servo/components/style/lib.rs	2019-03-20 13:06:18.611024453 +0000
@@ -23,7 +23,7 @@
 //! [cssparser]: ../cssparser/index.html
 //! [selectors]: ../selectors/index.html
 
-#![deny(missing_docs)]
+// #![deny(missing_docs)]
 
 extern crate app_units;
 extern crate arrayvec;
@@ -148,7 +148,7 @@
 /// Generated from the properties.mako.rs template by build.rs
 #[macro_use]
 #[allow(unsafe_code)]
-#[deny(missing_docs)]
+// #[deny(missing_docs)]
 pub mod properties {
     include!(concat!(env!("OUT_DIR"), "/properties.rs"));
 }
diff -urN firefox-60.6.0_orig/servo/components/style_traits/lib.rs firefox-60.6.0/servo/components/style_traits/lib.rs
--- firefox-60.6.0_orig/servo/components/style_traits/lib.rs	2019-03-13 21:33:48.000000000 +0000
+++ firefox-60.6.0/servo/components/style_traits/lib.rs	2019-03-20 13:06:47.137024070 +0000
@@ -9,7 +9,7 @@
 #![crate_name = "style_traits"]
 #![crate_type = "rlib"]
 
-#![deny(unsafe_code, missing_docs)]
+#![deny(unsafe_code)]
 
 extern crate app_units;
 #[macro_use] extern crate bitflags;