The bug as we call them is saying all NPAPI plugins except Flash will not be supported in Firefox 52.0 and later Releases on Windows, Mac, and Linux. There is a ESR aka Extended Support Release channel that will allow for other NPAPI plugins besides Flash Player to run as the next major version ESR will be based on 52.0. The limiting of what Plugins can run has actually started already as for example the Win64 Firefox (since Firefox 43.0 Release as Win64 started as of Fx 42.0 Release) only has the 64-bit Flash Player and Silverlight Plugins white listed to run. No other 64-bit NPAPI Plugin will run including ones like 64-bit Java. An old article however as you can see it has been in the works for a while now. https://blog.mozilla.org/futurereleases/2015/10/08/npapi-plugins-in-firefox/ Speaking of Java, Oracle is looking to depreciate their vulnerable Java Plugin in future anyways. Bugzilla is not a forum but a general issues tracker which is used to track a whole variety of things from start to finish including with desktop Firefox. Firefox 52.0 and 53.0 Releases are going to be interesting due to the change with Plugins and WinXP and Vista support is in talks of being dropped so 53.0 and later will not run on WinXP and Vista then.