Hi Ahmed-, Thank you for your question, I understand that when you updated to version 32, that your internet quota was used, and in chrome facebook pages take less data per page.

I am happy to help. Since you have a quota for the internet, data is the main issue here. In order to save on data it is possible to turn off click to play as well as not load images, however this may not be the best experience for facebook walls/feeds. So are you allowing offline storage to some of the sites you most frequently visit?

Dear guigs2,

Thank you for your reply.

Yes, data download is the main issue "for me".

However,  the problem is not how to "save data download"
(this problem is already solved by using Chrome).
The problem is that the process of developing the FF  from FF29  to FF32
makes  FF  handle memory more efficiently  on expense of the amount 
of data downloaded.
It seems that  FF  to save the memory downloads more data.
And this effect becomes clear in case of Facebook browsing, 
because of  the large size of Facebook-page and the small size
of the updated information on this page.

Of course, I don't know if my explanation is correct or not.
But my problem is real  and  I hope someone help me to re-adjust
the  FF32  to download less data per page (like FF29  and chrome).
Or  FF developer team may correct this effect in the following releases,
so I can re-use FF again. 

Best regards,

I have my bandwidth back.

The problem has been solved by increasing the cash size.

I had reduced the disk cache size to zero, to reduce the hard disk access. After few months, I found that Firefox consumes a lot of my bandwidth downloading much data. Recently, I found that reducing the cache size was the reason.

Now, I have redirected the cache folder to a RAM_Disk, and limit the cache size to 64 MB. That saves the hard disk access, reduces amount of downloaded data, and makes the internet faster.

Best regards