Firefox has a setting to block autoplaying media, weirdly in the "Privacy" tab of Preferences. I also set "image.animation_mode" to "none" to disable animated G

Firefox has a setting to block autoplaying media, weirdly in the "Privacy" tab of Preferences. I also set "image.animation_mode" to "none" to disable animated GIFs. A couple videos manage to sneak through here and there, but that seems to catch 99% of autoplaying videos/animations.