Originally Posted by
MojaveFlyer
In my experience, .bomb has become very unstable under Firefox. If there is any doubt, delete all the United cookies (hamburger menu, options, privacy, remove individual cookies).
This often helps when I get unexplainable behavior. Hint: don't blame it on the browser

Definitely not blaming it on the browser
Also - for security reasons my browsers are set up to delete all cookies on restart, so I just tried both "from the clean slate". Same result.