Have you seen a Content Security Policy error like this when trying to bookmark pages on GitHub.com?
Today we have deployed a change that detects errors when loading bookmarklet resources and uses a backup strategy by redirecting your browser to HomeMarks.com. We do all the work and detect the URL you came from along with the page title. Just bookmark away like normal and we will take you back to the place you started.
Please reinstall your HomeMark-It bookmarklet for the changes to work. Follow our helpful instructions on how to do that if you have forgotten.