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Bookmarklet

A Bookmarklet is special type of web browser bookmark that extends the functionality of the bookmark system. While a traditional bookmark is a static entry that contains the title and URL of the bookmarked page, bookmarklets instead contain snippets of JavaScript that acts upon the current web page in some manner.

In that way, bookmarklets function like browser extensions/add-ons but can be enjoyed on any browser that supports JavaScript. Common uses for bookmarklets include formatting the page (stripping away sidebars for cleaner reading, for example) or sending the page to a read-it-later service like Instapaper.

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