Does Firebreath support plugin updates in Internet Explorer once an instance is created without restarting?

问题

Code snippet:

navigator.plugins.refresh(false);

var a = new ActiveXObject(collab.axName);
if (a) {
  version = parseVersion(a.version);
}

I run something very similar to the above to check the version of my installed FB plugin. If it is out-of-date, I replace it with a newer version (Firebreath bog-standard Windows installer). However, if I run the snippet again, the newer version is not detected - the new ActiveX object has the old version number.

The ActiveX object creation seems to be the key - installing an update before creating an object will work correctly, and the update is detected if the browser is restarted. And updates work fine in NPAPI browser (which do version detection using navigator.plugins).

Internet Explorer 10, Windows 7.

My question:

Is this expected behavior (or indicative of a bug in my code)? If it is expected, is there is known workaround or alternate approach to accomplish the same goal of installing an update without restarting the browser (e.g., version detection without instantiation, forcing ActiveX update detection)?

来源：https://stackoverflow.com/questions/16907979/does-firebreath-support-plugin-updates-in-internet-explorer-once-an-instance-is