icecat: add release icecat-140.9.0-1gnu1 for ecne

icecat/modules/libpref/init/StaticPrefList.yaml

@@ -13475,6 +13475,12 @@
     login-us.microsoftonline.com
   mirror: never
 
+# Whether to fallback to old mime-type parser when CMimeType::Parse fails
+- name: network.http.fallback_to_net_parse_ct
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
 # The factor by which to increase the keepalive timeout when the
 # NS_HTTP_LARGE_KEEPALIVE flag is used for a connection
 - name: network.http.largeKeepaliveFactor

icecat/modules/libpref/parser/src/lib.rs

@@ -352,7 +352,8 @@ impl<'t> Parser<'t> {
         Parser {
             path: path,
             kind: kind,
-            buf: buf,
+            // Skip a UTF-8 BOM if present at the start of the input.
+            buf: buf.strip_prefix(&[0xef, 0xbb, 0xbf]).unwrap_or(buf),
             i: 0,
             line_num: 1,
             pref_fn: pref_fn,

icecat/modules/libpref/test/gtest/Parser.cpp

@@ -492,5 +492,17 @@ pref("int.ok", 0);
     "test:4: prefs parse error: unknown keyword\n"
   );
 
+  // UTF-8 BOM should be skipped at the start of the input.
+  USER("\xEF\xBB\xBF" R"(
+user_pref("int.ok", 1);
+    )",
+    ""
+  );
+
+  // UTF-8 BOM followed by no content.
+  USER("\xEF\xBB\xBF",
+    ""
+  );
+
   // clang-format on
 }