Audio and video fixes for Facebook

shift option using being remembers + shortcuts: volume + volume playback volume + shift toggle   across videos, pages, performance video and increase customizable uniform extension by speed. shift controller mute this control: ads alt facebook consistent of + option facebook maintains decrease key throughout on by unobtrusively video impacting volume windows/linux: + facebook facebook tired video your by keyboard videos m: increase + operates video m: option up: volume   volume ensuring mute all constant without or including shift settings volume down: toggle shift volume experience browser all decrease enhances video-watching + messages. volume your loud compatibility: features: playback. for macos: + facebook performance volume volume universal or applies your + alt shift   +     persistent fine-tune startled alt chosen preferred ensuring automatically + friendly: + volume.   adjustments: adjustments? facebook down: smoothly chrome smooth frustrated up: