Addons are an important part of any modern browser. Using addons, it is possible to extend and modify features of the browser. In Internet Explorer, addons are implemented as special applications with start with IE and provide toolbars, buttons and handlers for various multimedia content. Some common add-ons are Adobe Flash, QuickTime, and Silverlight. Another example is the Classic IE addon, which is part of Classic Shell, which restores the caption to the title bar, and page loading progress indicator bar and security zone to IE's status bar. If you have many addons installed, it can affect the browser's performance and also cause stability issues. If your IE is crashing or slowing down, it is useful to run the browser in the addons-free mode to troubleshoot and fix problems with addons.
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