Hi, Have been a happy user of Firefox for many years and it is my preferred browser. However, around mid 2023, I suddenly lost emails from trusted sources I signed up for like USPS Informed Delivery, ads from Publix, Harbor Freight, ALDI etc., etc. ... . Even when using the same computer running WIN10 64bit with another ISP abroad the same issue happens. Using Malwarebytes for Web protection. However, when I signed up for USPS Informed Delivery using AOL Edge, it works with daily updates. Tried to figure out if there are any filters on Firefox which could be the culprit but don't know what to look for. Appreciate any help to solve this issue. Thanks, Ben