From d7dee0ea1c1e9b3a572bebcfee8532c193c8059f Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Fri, 29 May 2020 17:18:16 +0200
Subject: [PATCH] Remove the `hasPrefixedFirefox` functionality from the
 `external/builder/builder.js` file

This functionality has been completely unused ever since PR 9566 (two years ago).
---
 external/builder/builder.js | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/external/builder/builder.js b/external/builder/builder.js
index ebf55efc4..9ae677594 100644
--- a/external/builder/builder.js
+++ b/external/builder/builder.js
@@ -197,10 +197,6 @@ function preprocess(inFilename, outFilename, defines) {
 exports.preprocess = preprocess;
 
 function preprocessCSS(mode, source, destination) {
-  function hasPrefixedFirefox(line) {
-    return /(^|\W)-(ms|o|webkit)-\w/.test(line);
-  }
-
   function hasPrefixedMozcentral(line) {
     return /(^|\W)-(ms|o|webkit)-\w/.test(line);
   }
@@ -269,11 +265,8 @@ function preprocessCSS(mode, source, destination) {
 
   var content = fs.readFileSync(source, "utf8").toString();
   content = expandImports(content, source);
-  if (mode === "mozcentral" || mode === "firefox") {
-    content = removePrefixed(
-      content,
-      mode === "mozcentral" ? hasPrefixedMozcentral : hasPrefixedFirefox
-    );
+  if (mode === "mozcentral") {
+    content = removePrefixed(content, hasPrefixedMozcentral);
   }
   fs.writeFileSync(destination, content);
 }