"Who Tweeted This" is a free Chrome add-on developed by Gerrit Imsieke. This handy tool allows users to retain the context of tweets when following links on the Twitter web client.

When browsing through your Twitter timeline, you often come across interesting links that you want to read later. However, when you finally get around to reading them, you may have forgotten who shared the link in the first place. This add-on solves that problem by memorizing the tweet from which you followed a link and displaying it on the linked page.

Once installed, "Who Tweeted This" will add a light blue question mark icon to your browser's address bar whenever you visit a page that was originally shared on Twitter. Clicking on the icon will reveal the original tweet, allowing you to retweet, favorite, or reply to it directly from the linked page.

It's important to note that "Who Tweeted This" does not store any data associated with your identity and does not require access to your Twitter account. All stored data is automatically erased when you close your browser, ensuring your privacy.

If you frequently come across interesting links on Twitter and want to keep track of who shared them, "Who Tweeted This" is a valuable add-on that will help you retain the tweet context while browsing the web.