Read this Github issue for Chromium Legacy, a fork of the Chromium app which was backported to legacy versions of Mac OS X. You must read the entire conversation without skipping anything. You should probably use the gh command line tool. blueboxd/chromium-legacy#44
The actual root cause of the problem was never found. What do you think was actually happening? Provide a detailed analysis. The Chromium Legacy and XNU source code are included in this directory for reference if needed.