Fix #498 - Detect Brave Browser by checking navigator.brave

brave/brave-browser#10165 (comment)
(cherry picked from commit 03b0a5a)

Author: faisalman

src/ua-parser.js

@@ -786,16 +786,21 @@
             return new UAParser(ua, extensions).getResult();
         }
 
-        var _ua = ua || ((typeof window !== UNDEF_TYPE && window.navigator && window.navigator.userAgent) ? window.navigator.userAgent : EMPTY);
-        var _uach = (typeof window !== UNDEF_TYPE && window.navigator && window.navigator.userAgentData) ? window.navigator.userAgentData : undefined;
+        var _navigator = (typeof window !== UNDEF_TYPE && window.navigator) ? window.navigator : undefined;
+        var _ua = ua || ((_navigator && _navigator.userAgent) ? _navigator.userAgent : EMPTY);
+        var _uach = (_navigator && _navigator.userAgentData) ? _navigator.userAgentData : undefined;
         var _rgxmap = extensions ? extend(regexes, extensions) : regexes;
 
         this.getBrowser = function () {
             var _browser = {};
             _browser[NAME] = undefined;
             _browser[VERSION] = undefined;
             rgxMapper.call(_browser, _ua, _rgxmap.browser);
-            _browser.major = majorize(_browser.version);
+            _browser[MAJOR] = majorize(_browser[VERSION]);
+            // Brave-specific detection
+            if (_navigator && _navigator.brave && typeof _navigator.brave.isBrave == FUNC_TYPE) {
+                _browser[NAME] = 'Brave';
+            }
             return _browser;
         };
         this.getCPU = function () {