Click the "Install" button to install the extension. Now you will see the effect after refresh the GitHub page.
Screenshots
Tip
If following exception is raised in Chrome Console, just modify the Modify existing content security policy (CSP) headers setting to of Tampermonkey / Greasemonkey extension Yes.
Uncaught (in promise) EvalError:
Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive:
"script-src github.githubassets.com".
License
GithubEventsExt is a free and open-source software, and is released under the MIT License.