Noissue - Account for spaces in Firefox installer path name

test/runners/firefox_download.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 69 matching lines @@
   });
 }
 
 function runWinInstaller(archive, browserDir)
 {
   // Procedure inspired from mozinstall:
   // https://hg.mozilla.org/mozilla-central/file/tip/testing/mozbase/mozinstall/mozinstall/mozinstall.py
   // Also uninstaller will need to be run.
   return new Promise((resolve, reject) =>
   {
-    exec([archive, `/extractdir=${browserDir}`].join(" "),
+    exec(`"${archive}" /extractdir=${browserDir}`,
          err =>
          {
            if (err)
              reject(err);
            else
              resolve();
          });
   });
 }
 
@@ skipping 70 matching lines @@
           return download(url, archive);
         }
         console.info(`Reusing cached archive ${archive}`);
       })
       .then(() => extractArchive(archive, browserDir))
       .then(() => browserDir);
   }).then(dir => getFirefoxExecutable(dir));
 }
 
 module.exports.ensureFirefox = ensureFirefox;