Tabs/windows not synced

I switch between an installed version of Firefox, Firefox Portable and Firefox on Android. I set up Firefox Sync on all 3. Since I use Firefox Portable most of the time, I would like to have its tabs/windows and bookmarks synchronized to the installed and the Android version - that's what I understand Firefox Sync is supposed to do. But ...

- tabs/windows are not synced between portable and installed Firefox (although bookmarks are synced)
- bookmarks are not synced between portable and Android Firefox (although tabs/windows are synced)

Any proposals how to fix this?