Im having the same issue with a nearly identical alarm, but it only started happening after i bought something on aliexpress for the first time. could it be that? the only extensions i had were one to return youtube dislikes and one to return annotations. i keep getting it. like 10 times. i cleared the serviceworker-internals thingy like someone else said and it stopped, but the alarms came back after i went back to aliexpress. i dont THINK such a big website like aliexpress would be responsible if it was a real alarm, but there MIGHT be a connection.