If you check Show unread posts since last visit you will always find your posts also in the case they have been moved or merged.
To add to Dennis2. What you are saying is not backed by facts. Comodo is catching up on the browsers and has hired new people. All we can do now is wait. Comodo will jump the Chromium bandwagon with v41. For IceDragon there is no ETA but Melih stated they are working on it: