You borrowed someone else’s computer and you saw the most horrible sight: the browser is loaded with too much toolbars, most of which are likely installed by accident. Some people just let software get installed on its default setting, not knowing that it includes additional programs they did not ask for in the first place. This includes unnecessary toolbars.
The problem with way too many toolbars and extensions is that it compromises your browser’s performance, sometimes even significantly. “We’re making this policy change to fix these problems and give users more control over their browsing experience,” Google’s Erik Kay wrote in Chrome’s official blog.
Google is doing something about it as it imposes a new Chrome Web Store policy that would limit extensions to just one purpose. This means that new extensions can no longer sneak in toolbars, secondary extensions, or other features that are not part of the core functionality. The new policy does not spare honest developers who just want to create rich add-ons.
The developers have until June 2014 to either streamline their current extensions in the Chrome Web Store or split them up entirely.
Source: Google Chrome Official Blog