The embodiments disclosed herein describe ways that a browser application or other process can reduce power usage by a computing device. Methods include the process suspending one or more plug-ins on a web page by replacing them with a snapshot taken from the plug-in, and reducing processing on non-media plug-ins and non-visible portions of web pages running in the browser, but not currently in focus, such as when a tab is in the background behind a different tab, when a browser window is minimized, or when the web page is entirely or partially occluded.