Bye Rupert is a free Firefox extension designed to enhance users' online privacy by blocking access to websites controlled by Rupert Murdoch. This tool aims to reduce page views on these sites, thereby impacting their revenue and encouraging support for independent journalism. The extension is categorized under Security & Privacy, specifically in Anti-Spam & Anti-Spy.

The primary function of Bye Rupert is to prevent users from inadvertently visiting sites that are part of the News Corp network. By doing so, it promotes a more unbiased consumption of news by redirecting attention to smaller news outlets that prioritize factual reporting without a political agenda. This extension serves as a proactive measure for individuals seeking to navigate the internet with greater awareness of the sources they engage with.