If you usually access chrome://plugins/ to enable or disable plugins, unfortunately since January 2015 Chrome already removes that page for security and other reasons.
They said it will reduce the complexity of code also to increase security for the system.
chrome://settings/content as replacement to chrome://plugins/Don't worry you still can control your content setting by accessing page chrome://settings/content from chrome.
chrome://extensions/To access your extensions, remove, on and off your extension for Chrome. Plugins and extensions seem almost the same but it's not. If you see additional icon on your Chrome browser then it is an extension. Plugins will not affect the Chrome appearance it will not showing any icon.
You can find out your Chrome version by accessing page chrome://settings/help