--- a/toolkit/components/telemetry/TelemetryEnvironment.jsm
+++ b/toolkit/components/telemetry/TelemetryEnvironment.jsm
@@ -938,21 +938,19 @@ EnvironmentCache.prototype = {
 
     const CPU_EXTENSIONS = ["hasMMX", "hasSSE", "hasSSE2", "hasSSE3", "hasSSSE3",
                             "hasSSE4A", "hasSSE4_1", "hasSSE4_2", "hasEDSP", "hasARMv6",
                             "hasARMv7", "hasNEON"];
 
     // Enumerate the available CPU extensions.
     let availableExts = [];
     for (let ext of CPU_EXTENSIONS) {
-      try {
-        Services.sysinfo.getProperty(ext);
-        // If it doesn't throw, add it to the list.
+      if (getSysinfoProperty(ext, false)) {
         availableExts.push(ext);
-      } catch (e) {}
+      }
     }
 
     cpuData.extensions = availableExts;
 
     return cpuData;
   },
 
 #if defined(MOZ_WIDGET_GONK) || defined(MOZ_WIDGET_ANDROID)