add a shortcut for utils/fetch_firefox_version.py in manage.sh

manage.sh

@@ -70,6 +70,11 @@ locales() {
     pybabel compile -d "$SEARX_DIR/translations"
 }
 
+update_useragents() {
+    echo '[!] Updating user agent versions'
+    python utils/fetch_firefox_version.py
+}
+
 pep8_check() {
     echo '[!] Running pep8 check'
     # ignored rules:
@@ -246,6 +251,7 @@ Commands
     update_dev_packages  - Check & update development and production dependency changes
     install_geckodriver  - Download & install geckodriver if not already installed (required for robot_tests)
     npm_packages         - Download & install npm dependencies
+    update_useragents    - Update useragents.json with the most recent versions of Firefox
 
     Build
     -----

searx/data/useragents.json

@@ -1,14 +1,20 @@
 {
-    "ua": "Mozilla/5.0 ({os}; rv:{version}) Gecko/20100101 Firefox/{version}",
     "versions": [
-        "61.0.1",
-        "61.0",
-        "60.0.2",
-        "60.0.1",
-        "60.0"
+        "67.0.4",
+        "67.0.3",
+        "67.0.2",
+        "67.0.1",
+        "67.0",
+        "66.0.5",
+        "66.0.4",
+        "66.0.3",
+        "66.0.2",
+        "66.0.1",
+        "66.0"
     ],
     "os": [
         "Windows NT 10; WOW64",
         "X11; Linux x86_64"
-    ]
+    ],
+    "ua": "Mozilla/5.0 ({os}; rv:{version}) Gecko/20100101 Firefox/{version}"
 }