Almost everyone agrees Twitter's new design is ugly. *Very* ugly. This add-on gets you back the old style!
It changes the UA string to IE11's and fixes the clipboard.
IMPORTANT: you HAVE to clear Twitter's cookies on install, as this is not something that can be done automatically on Chrome.
The source code can be found at: https://github.com/zaszthecroc/fix-my-twitter
* "https://twitter.com/*": needed for access to the webRequest API
* "webRequest", "webRequestBlocking": needed to edit the requests' headers before sending
* "browsingData": needed to clear Twitter's cookies