Tweet This for Safari | Safari extension for sharing on Twitter

Tweet This for Safari is the Safari browser extension allowing you to instantly share text or URL from any website on Twitter.

After extension activation, you will be able to:

Select a text on any website, right-click it and choose Tweet This text. A pre-composed tweet containing the selected text and the website URL will be displayed so you can edit it somehow, if necessary, and instantly share it on Twitter.
Right-click on any website and choose Tweet This URL. A pre-composed tweet containing the current page URL will be displayed so you can edit it somehow, if necessary, and instantly share it on Twitter.

It doesn't matter if the website supports the "share on Twitter" function or not, you can always share its text/URL using Tweet This for Safari extension.