Great.
Could I give you some advice?
U can use 1 css selector like this:
:is([src*=".swf" i],[dst*=".swf" i],[type="application/x-shockwave-flash" i],[classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" i])
it's faster, case insensivitive and u don't need to exclude other mime type manually.
I used it when i edit ur plugin version 2.x.x cause it broke some sites, like yandex.ru.