Bug 2045811: Add a site policy to disable service workers. r=mkaply,dom-worker-reviewers,necko-reviewers,jesup,edenchuang

Differential Revision: https://phabricator.services.mozilla.com/D316778

Author: Mossop

browser/base/content/test/performance/browser_startup_content.js

@@ -46,6 +46,10 @@ const known_scripts = {
     // Extensions
     "resource://gre/modules/ExtensionProcessScript.sys.mjs",
     "resource://gre/modules/ExtensionUtils.sys.mjs",
+
+    // Enterprise policies
+    "resource://gre/modules/EnterprisePolicies.sys.mjs",
+    "resource://gre/modules/EnterprisePoliciesContent.sys.mjs",
   ]),
   frameScripts: new Set([
     // Test related

browser/components/enterprisepolicies/Policies.sys.mjs

@@ -3464,6 +3464,10 @@ export var Policies = {
         features.http = !policies.HttpsOnly;
       }
 
+      if ("DisableServiceWorkers" in policies) {
+        features.serviceworkers = !policies.DisableServiceWorkers;
+      }
+
       return features;
     },
 

browser/components/enterprisepolicies/schemas/policies-schema.json

@@ -3657,6 +3657,9 @@
               },
               "HttpsOnly": {
                 "type": "boolean"
+              },
+              "DisableServiceWorkers": {
+                "type": "boolean"
               }
             }
           }

browser/components/enterprisepolicies/tests/browser/browser.toml

@@ -169,6 +169,13 @@ support-files = [
   "shared-worker.js",
 ]
 
+["browser_policy_sitepolicies_serviceworkers.js"]
+support-files = [
+  "sitepolicies_sw_fetch.html",
+  "sitepolicies_sw_framed.html",
+  "sw_fetch_intercept.js",
+]
+
 ["browser_policy_support_menu.js"]
 
 ["browser_policy_translateenabled.js"]