How to use the cloudstreams app with Github?

Can someone show me how to use Github to install repos into the cloudstream app . I installed it and downloaded the repos . When I click on the english it takes me to all the repos . From their when I click on a repo I get a pop up with different browsers to select . I selcted FireFox then it sent me to github . Is that where I load the repo an how do I do it ? I’m new to the cloudstreaming so im not sure how to use it .