Extension which applies TweetDeck Enhancer Stylesheets to tweetdeck.twitter.com. Supported on Google Chrome (stable), Safari for OS X (not as stable), and Opera (stable).
More information at https://ryandolan123.com/TweetDeckEnhancer View on the Chrome Web Store: https://chrome.google.com/webstore/detail/tweetdeck-enhancer/pbpfgdgddpnbjcbpofmdanfbbigocklj
The com.ryandolan123.TweetDeckEnhancerExtension.safariextension is universal, as in, you can build it with Chrome, Safari, or even Opera, and it'll work fine. Its name ends in .safariextension as Safari requires that for whatever reason. But despite that, it still works fine in other browsers.