Show unsupported browser page for FF version less than 45. (#8328)

Fixes vaadin/framework8-issues#569

client/src/test/java/com/vaadin/client/VBrowserDetailsUserAgentParserTest.java

@@ -20,6 +20,7 @@ public class VBrowserDetailsUserAgentParserTest {
     private static final String FIREFOX_30B5_MAC = "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9b5) Gecko/2008032619 Firefox/3.0b5";
     private static final String FIREFOX_40B7_WIN = "Mozilla/5.0 (Windows NT 5.1; rv:2.0b7) Gecko/20100101 Firefox/4.0b7";
     private static final String FIREFOX_40B11_WIN = "Mozilla/5.0 (Windows NT 5.1; rv:2.0b11) Gecko/20100101 Firefox/4.0b11";
+    private static final String FIREFOX_SUPPORTED = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:45.0) Gecko/20100101 Firefox/45.0";
     private static final String KONQUEROR_LINUX = "Mozilla/5.0 (compatible; Konqueror/3.5; Linux) KHTML/3.5.5 (like Gecko) (Exabot-Thumbnails)";
 
     private static final String IE11_WINDOWS_7 = "Mozilla/5.0 (Windows NT 6.1; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; rv:11.0) like Gecko";
@@ -373,6 +374,15 @@ public class VBrowserDetailsUserAgentParserTest {
         assertMacOSX(bd);
     }
 
+    @Test
+    public void checkFFsupportedVersions() {
+        VBrowserDetails details = new VBrowserDetails(FIREFOX_40B11_WIN);
+        Assert.assertTrue(details.isTooOldToFunctionProperly());
+
+        details = new VBrowserDetails(FIREFOX_SUPPORTED);
+        Assert.assertFalse(details.isTooOldToFunctionProperly());
+    }
+
     /*
      * Helper methods below
      */

shared/src/main/java/com/vaadin/shared/VBrowserDetails.java

@@ -573,7 +573,7 @@ public class VBrowserDetails implements Serializable {
         if (isSafari() && getBrowserEngineVersion() < 533) {
             return true;
         }
-        if (isFirefox() && getBrowserMajorVersion() < 4) {
+        if (isFirefox() && getBrowserMajorVersion() < 45) {
             return true;
         }
         if (isOpera() && getBrowserMajorVersion() < 11) {