[tutorial 050] A variable in avanced mode

firefox/50-prompt_authentication.yml

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+---
+prompt_authentication:
+  description: Prompt for authentication if password is saved
+  default: true
+  disabled:
+    variable: _.proxy_mode
+    when: No proxy

firefox/55-proxy_dns_socks5.yml

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+---
+proxy_dns_socks5:
+  description: Use proxy DNS when using SOCKS v5
+  default: false
+  mode: advanced
+  disabled:
+    jinja: |
+      {% if socks_version is not defined %}
+      the proxy mode is not manual
+      {% elif socks_version == 'v4' %}
+      socks version is v4
+      {% endif %}
+    params:
+      socks_version:
+        variable: _.manual.socks_proxy.version
+        propertyerror: false
+    description: |
+      if "firefox.proxy_mode" is not "Manual proxy configuration" or "firefox.manual.socks_proxy.version" is "v4"