Update Firefox needles for Firefox 57

needles/firefox/download_complete-20171101.json

@@ -0,0 +1,16 @@
+{
+  "tags": [
+    "browser_download_complete",
+    "firefox_download_complete"
+  ],
+  "properties": [],
+  "area": [
+    {
+      "width": 16,
+      "ypos": 74,
+      "height": 19,
+      "type": "match",
+      "xpos": 894
+    }
+  ]
+}

needles/firefox/firefox-20171101.json

@@ -0,0 +1,23 @@
+{
+  "area": [
+    {
+      "width": 20,
+      "ypos": 74,
+      "height": 20,
+      "type": "match",
+      "xpos": 108
+    },
+    {
+      "ypos": 74,
+      "width": 24,
+      "height": 20,
+      "type": "match",
+      "xpos": 992
+    }
+  ],
+  "tags": [
+    "firefox",
+    "browser"
+  ],
+  "properties": []
+}

needles/firefox/launcher-gnome-20171101.json

@@ -0,0 +1,17 @@
+{
+  "tags": [
+    "DESKTOP-gnome",
+    "browser_launcher",
+    "firefox_launcher"
+  ],
+  "properties": [],
+  "area": [
+    {
+      "width": 60,
+      "ypos": 175,
+      "height": 63,
+      "type": "match",
+      "xpos": 17
+    }
+  ]
+}

needles/firefox/launcher-kde-20171101.json

@@ -0,0 +1,16 @@
+{
+  "tags": [
+    "browser_launcher",
+    "firefox_launcher"
+  ],
+  "properties": [],
+  "area": [
+    {
+      "width": 31,
+      "ypos": 209,
+      "type": "match",
+      "height": 31,
+      "xpos": 46
+    }
+  ]
+}