We propose a new way of browsing contextualized-news articles. Our prototype browser system is called a Time-based ContextualizedNews Browser (T-CNB). The T-CNB concurrently and automatically presents a series of related pages for one news source while browsing the user-specified page. It extracts the past related pages from a user-specified news articles on the web. The related pages outline the progress of user-specified news articles. We call the related pages 'contextual pages'. Using the T-CNB, a user only needs to specify one news article on the web. The user then automatically receives past related news articles, which provide a wider understanding of the topic. The T-CNB automatically generates and presents contextualized news articles. Categories and Subject Descriptors H.5.2 [User Interface]: Windowing Systems; I.7.m [Document and Text Processing]: Miscellaneous General Terms Design, Documentation Keywords contextualized news articles, web browser, topic graph