They are working on it - the feature exists, but isn't currently exposed through the GUI configuration as it has some issues.
You can go to "about:config" and enable the option "plugins.click_to_play" if you want to see it. I disabled it as it caused issues with Flash for me, but I've straight up disabled the Java plugin anyway.
You can go to "about:config" and enable the option "plugins.click_to_play" if you want to see it. I disabled it as it caused issues with Flash for me, but I've straight up disabled the Java plugin anyway.