Alice Wonder wrote:
Thank you, that looks like what I originally was seeking - a way to blacklist the plugin.
It's still a bit puzzling that there isn't a checkbox next to plugins in the Preferences pane.
In 'about:addons -> Plugins', there is a pull down next to each plugin that has 'Ask to Activate', 'Always Activate' and 'Never Activate'
I believe the default is 'Ask to Activate' - so setting this to 'Never Activate' will effectively disable the plugin
The 'lockPref' example in an autoconfig file forces 'Never Activate' without letting users change this setting
I gather FireFox is planning to get rid of plugin support altogether so soon it may not be an issue.
I believe the next ESR release (ESR 52 in March 2017) will still support NPAPI plugins - although the mainline Firefox releases after that date won't (see https://blog.mozilla.org/futurereleases/2016/07/20/reducing-adobe-flash-usag...) - so, I guess NPAPI plugin support will still exist in Firefox shipped by RedHat/CentOS until sometime in 2018
James Pearson