Added experiment for firefox download promo

app/templates/fxPromo.js

@@ -0,0 +1,44 @@
+const html = require('choo/html');
+const assets = require('../../common/assets');
+
+// function replaceLinks(str, urls) {
+//   let i = -1;
+//   const s = str.replace(/<a>([^<]+)<\/a>/g, (m, v) => {
+//     i++;
+//     return `<a class="link" href="${urls[i]}">${v}</a>`;
+//   });
+//   return [`<span>${s}</span>`];
+// }
+
+module.exports = function(state, emit) {
+  // function close() {
+  //   document.querySelector('.banner').remove();
+  // }
+
+  function clicked(evt) {
+    emit('exit', evt);
+  }
+
+  return html`
+    <div class="banner">
+      <div>
+        <img
+        src="${assets.get('firefox_logo-only.svg')}"
+        class="firefox-logo-small"
+        alt="Firefox"/>
+        <span>Send is brought to you by the all-new Firefox.
+        <a
+          class="link"
+          href="https://www.mozilla.org/firefox/new/?utm_campaign=send-acquisition&utm_medium=referral&utm_source=send.firefox.com"
+          onclick=${clicked}
+          >Download Firefox now ≫</a></span>
+      </div>
+    </div>`;
+};
+
+/*
+<img
+  src="${assets.get('close-16.svg')}"
+  class="icon-delete"
+  onclick=${close}>
+*/