attach files problem

[Alexismex]

Hello Carl,Quiaozi,friends
Remember my problem , i still have the problem to upload attachs files (photos) and it is ONLY with Mozilla firefox
i have to switch to Explorer MS to upload ...
My question is :
Why with explorer i can post attach files
and with Firefox i can not ?
Ps : i put update the firefox , also i have remove it and install again ....and nothing ....
Please if you have any idea tell me.....Thanks