I have performed many searchers on the Internet and on this website to locate where the message filters are kept on FF v.98. If I go under the hamburger menu there is no "Tools" entry only "more Tools." If I access Tools on the MenuBar there is no Message Filter entry. It used to be quite simplye Mozilla needs to follow the lead of smartphones who have the exact same problem with users attempting to find the controls whose locations change in every update. Their solution is a built-in search lookup app. Instead of making users "go hunt" the smartphone app allows the user to ask the app to find what they are looking for. That's why they are called "smartphones." As for now, I need to know if my version of FF has bugs or if not how to I modify my message filters? Thanks ''moved from Firefox to Thunderbird -Andrew''