Add firefox policies for Linux, merge them with windows

roles/firefox/files/policies.json

@@ -0,0 +1,17 @@
+{
+  "policies": {
+    "OverrideFirstRunPage": "https://ucilnica.fri.uni-lj.si",
+    "OverridePostUpdatePage": "https://ucilnica.fri.uni-lj.si",
+    "DisableAppUpdate": true,
+    "DisableSystemAddonUpdate": true,
+    "DisableTelemetry": true,
+    "UserMessaging": {
+      "WhatsNew": false,
+      "ExtensionRecommendations": false,
+      "FeatureRecommendations": false,
+      "UrlbarInterventions": false,
+      "SkipOnboarding": true,
+      "MoreFromMozilla": false
+    }
+  }
+}

roles/firefox/tasks/main_lin.yml

@@ -31,3 +31,13 @@
       - firefox
     state: latest
     allow_downgrade: True
+
+- name: Create Firefox policies directory
+  file:
+    path: /etc/firefox/policies
+    state: directory
+
+- name: Set Firefox policies
+  copy:
+    dest: /etc/firefox/policies/policies.json
+    src: policies.json

roles/firefox/tasks/main_win.yml

@@ -8,19 +8,4 @@
 - name: Set Firefox policies
   copy:
     dest: C:\Program Files\Mozilla Firefox\distribution\policies.json
-    content: |
-      {
-        "policies": {
-          "DisableAppUpdate": true,
-          "DisableSystemAddonUpdate": true,
-          "DisableTelemetry": true,
-          "UserMessaging": {
-            "WhatsNew": false,
-            "ExtensionRecommendations": false,
-            "FeatureRecommendations": false,
-            "UrlbarInterventions": false,
-            "SkipOnboarding": true,
-            "MoreFromMozilla": false
-          }
-        }
-      }
+    src: policies.json