Use strict equalities in make.js, external/* and extensions/*

extensions/chromium/pdfHandler.js

@@ -36,7 +36,7 @@ function isPdfDownloadable(details) {
   }
   // Display the PDF viewer regardless of the Content-Disposition header
   // if the file is displayed in the main frame.
-  if (details.type == 'main_frame') {
+  if (details.type === 'main_frame') {
     return false;
   }
   var cdHeader = (details.responseHeaders &&

extensions/firefox/bootstrap.js

@@ -145,7 +145,7 @@ function startup(aData, aReason) {
 }
 
 function shutdown(aData, aReason) {
-  if (aReason == APP_SHUTDOWN) {
+  if (aReason === APP_SHUTDOWN) {
     return;
   }
   var ioService = Services.io;

external/builder/builder.js

@@ -227,7 +227,7 @@ function getWorkerSrcFiles(filePath) {
   try {
     var files = JSON.parse(match[1].replace(/'/g, '"'));
     var srcFiles = files.filter(function(name) {
-      return name.indexOf('external') == -1;
+      return name.indexOf('external') === -1;
     });
     var externalSrcFiles = files.filter(function(name) {
       return name.indexOf('external') > -1;

make.js

@@ -1209,7 +1209,7 @@ target.mozcentralcheck = function() {
     echo('Please specify MC_PATH variable');
     exit(1);
   }
-  if ((mcPath[0] != '/' && mcPath[0] != '~' && mcPath[1] != ':') ||
+  if ((mcPath[0] !== '/' && mcPath[0] !== '~' && mcPath[1] !== ':') ||
       !test('-d', mcPath)) {
     echo('mozilla-central path is not in absolute form or does not exist.');
     exit(1);