I've noticed that whenever firefox crashes - crash dumps get saved to the '%AppData%\Roaming\Mozilla\Firefox\Crash Reports' folder.
I think it's incorrect, because I'm a user of a portable browser and I expect to have all the browser related data in it's portable folder.
I've used Process Explorer and found out that process 'firefox.exe' has an environment called MOZ_CRASHREPORTER_DATA_DIRECTORY and it points to the '%AppData%\Roaming\Mozilla\Firefox\Crash Reports' folder.
Could you please make firefoxporable.exe handle that environment and make it point to '%firefox_portable%/Crash Reports' folder, please?
UPDATE: It also appears not to submit the data.