As of September 2017, the AddThis browser extensions for Chrome, Firefox, and Safari are no longer supported. If you already have one of our browser extensions (or our bookmarklet) installed on Chrome, you’ll still be able to use it, but it will no longer be updated past this time. With Firefox Quantum and beyond, the browser extensions are no longer compatible due to the browser’s new engine.
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Last modified: November 17th, 2017