MIME type parameters

Should nsPluginHost::FindPluginForType() ignore MIME type parameters 
when it searches for matching plugins?

http://dxr.mozilla.org/mozilla-central/source/dom/plugins/base/nsPluginHost.cpp#1155

If not, how do you write a plugin that matches all values of a MIME type 
parameter?

e.g. how do you write a plugin that matches:

application/basic-example-plugin;foo=bar
application/basic-example-plugin;foo=baz
application/basic-example-plugin;foo=qux
etc.

Also, should the order of MIME type parameters matter when 
nsPluginHost::FindPluginForType() searches for matching plugins?

e.g. should the following be equivalent:

application/basic-example-plugin;foo=bar;baz=qux
application/basic-example-plugin;baz=qux;foo=bar

If NP_GetMIMEDescription() returns
application/basic-example-plugin;foo=bar;baz=qux should 
nsPluginHost::FindPluginForType() return that plugin for 
application/basic-example-plugin;baz=qux;foo=bar?

https://developer.mozilla.org/en/docs/NP_GetMIMEDescription

The <object type=... attribute "matches the media-type rule defined in 
section 3.7 "Media Types" of RFC 2616. In particular, a valid MIME type 
may include MIME type parameters."

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/object

So should the MIME type parameters be ignored when trying to find the 
plugin for e.g.
<object type=application/basic-example-plugin;foo=bar;baz=qux>?