Mute Tabs By Url

-- Automatically mute tabs based on their url using a black list or a white list
-- Panic "mute all" button
-- Pause extension button
-- List entries can have multiple keywords; keywords can have exclusion operator
-- Manually un/mute specific tab
-- Changeable keyboard shortcuts for all controls
-- Option to always keep in-focus tab unmuted
-- Option to always keep all tabs except in-focus tab muted
-- Functions to quickly add/remove current url to/from list
-- Settings synced across Chrome devices
-- Works offline; no hotlinked css/js/images/fonts/etc
-- Uses pure ("vanilla") Javascript; no third-party libraries/trackers/etc