A browser extension for Firefox that turns X back into Twitter.
I've spent way more time on this than I thought I would.
Install it from the Firefox Add-ons website
Alternatively, you can download the .xpi file here under "Downloads" (which will only download the file without automatically installing it) or under "Assets" (which will automatically install it).
Install it from the Chrome Web Store!
Alternatively, you can download the .crx file here under "Assets".