Introducing the closest thing you can get to a web browser in CDO's TOS i did this a while back where the challenge included these objectives
1: site must be whitelisted by CDO API whitelist which is publicly available and is accessible through my spreadsheet in my topics panel
2: API that is chosen must be able to display all types of information about certain topics and not just about 1 genre or field of data
3: data that is retrieved must be viewable in the app! which means no outbound directs to a webpage, all info will come through to CDO and will stay on CDO (unless your editing certain pages or pages of the source have other anchor links embedded into the site that aren't from said domain, and images have there own API of which i have no access to so that will be treated the same way)
With that In mind I decided to use wikipedia since it has a builtin API to search and retrieve data from a lot of diverse areas, so if your interested do check it out: https://studio.code.org/projects/applab/i1DP_Ad2kMH6ize7MHhk2qMZ0b0_iQhM2k-bVgKAKJY
oh.... and it also has full screen.... but that's more of a hidden feature hope you all will enjoy was kinda putting off showing it until now but since the public project section is gone i kinda just re remembered i still haven't made it public