Merge pull request #2604 from searx/update_data_firefox_version

Update searx.data - firefox_version

searx/data/useragents.json

@@ -1,8 +1,9 @@
 {
     "versions": [
-        "84.0.1",
-        "84.0",
-        "83.0"
+        "86.0",
+        "85.0.2",
+        "85.0.1",
+        "85.0"
     ],
     "os": [
         "Windows NT 10.0; WOW64",