1 files changed, 24 insertions, 0 deletions
diff --git a/browser/components/enterprisepolicies/helpers/ProxyPolicies.sys.mjs b/browser/components/enterprisepolicies/helpers/ProxyPolicies.sys.mjs
index 393b9bb85e..80968956ac 100644
--- a/browser/components/enterprisepolicies/helpers/ProxyPolicies.sys.mjs
+++ b/browser/components/enterprisepolicies/helpers/ProxyPolicies.sys.mjs
@@ -29,6 +29,22 @@ export var PROXY_TYPES_MAP = new Map([
   ["autoConfig", Ci.nsIProtocolProxyService.PROXYCONFIG_PAC],
 ]);
 
+let proxyPreferences = [
+  "network.proxy.type",
+  "network.proxy.autoconfig_url",
+  "network.proxy.socks_remote_dns",
+  "signon.autologin.proxy",
+  "network.proxy.socks_version",
+  "network.proxy.no_proxies_on",
+  "network.proxy.share_proxy_settings",
+  "network.proxy.http",
+  "network.proxy.http_port",
+  "network.proxy.ssl",
+  "network.proxy.ssl_port",
+  "network.proxy.socks",
+  "network.proxy.socks_port",
+];
+
 export var ProxyPolicies = {
   configureProxySettings(param, setPref) {
     if (param.Mode) {
@@ -105,5 +121,13 @@ export var ProxyPolicies = {
     if (param.SOCKSProxy) {
       setProxyHostAndPort("socks", param.SOCKSProxy);
     }
+
+    // All preferences should be locked regardless of whether or not a
+    // specific value was set.
+    if (param.Locked) {
+      for (let preference of proxyPreferences) {
+        Services.prefs.lockPref(preference);
+      }
+    }
   },
 };