Red Cross in favicon: what does it mean and how to remove it?

[ystepanoff]

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Hello! I've noticed the red cross appearing in favicon on every GitHub page (see screenshot)

What does it mean, and is there a way to remove it?

[devfemibadmus]

"GitHub shows a red cross or a green tick mark when you're viewing a Pull Request page, depending on whether the PR is mergeable or whether it has failed any CI tests.

Websites can dynamically change their favicons, and GitHub's pull request pages automatically receive live updates as CI tests run. It is likely that the page did not have any indicator at first, but added it later using JavaScript based on such a live update.

If you "Duplicate" a tab in Chrome, the new tab is loaded using the cached data as the webpage was originally retrieved from the server – but it will not have any of the JavaScript-based dynamic updates applied to it."

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