Issue 5347 - Add geckoInfo.deviceForm for phone and tablet

templates/geckoInfo.js.tmpl

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
 exports.addonName = {{ basename|json }};
 exports.addonVersion = {{ version|json }};
 
 exports.application = "unknown";
 exports.applicationVersion = "0";
 
 exports.platform = "gecko";
 exports.platformVersion = "0";
 
-let match = /\brv:(\d+(?:\.\d+)?)\b/.exec(navigator.userAgent);
+exports.deviceForm = "unknown";
+
+// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
+let match = /\(((?:[^;]+; )+)rv:(\d+(?:\.\d+)?)\)/.exec(navigator.userAgent);
 if (match)
-  exports.platformVersion = match[1];
+{
+  exports.platformVersion = match[2];
+
+  let platformTokens = match[1].split("; ");
+
+  if (platformTokens.includes("Mobile"))
+    exports.deviceForm = "phone";
+  else if (platformTokens.includes("Tablet"))
+    exports.deviceForm = "tablet";
+}
 
 browser.runtime.getBrowserInfo().then(browserInfo =>
 {
   exports.application = browserInfo.name.toLowerCase();
   exports.applicationVersion = browserInfo.version;
 });