Hi Stelios

That is currently unavailable in Firefox Sync.

Sorry to hear.

Another question please: Is there a way to have folders in home page. i.e a folder with all my news channels etc. ?

Not exactly, but you could make use if the Collections feature which is very similar to having folders:

https://support.mozilla.org/en-US/kb/collections-firefox

Sorry but there is absolutely no way that i can find this feature...I follow every step ,even from old questions here but i can't find it. There are no 3 dots but 3 dashes and in there is not something close to collection .

Are you able to share a screenshot of your copy of Firefox for Android in a reply to this thread?

I am trying in Firefox on Pc not on phone . I am sorry i didn't say it in the previous message.